Pennetra (New Combat System)

 

Okay, here’s a new combat system.  I’m calling it Pennetra because I had to write the word ‘Penetrating’ like 10 times in this post and other potential names like Penetrox are already taken by industrial aluminum joint compounds.

I’m trying to do (1) something new, and (2) something where a smaller % of attacks are misses.

Simple Version

This is the one-roll version.

Next to each weapon in your inventory, you have two numbers: Penetration and Damage.  Penetration helps you hit, and Damage is how much you hurt the other guy.  

	Penetration	Damage
Dagger	d4	4
Sword	d6	4
Greataxe	d6	5

Making an Attack

When you make an attack, you roll Penetration to see if you hit.

• If the result equals the target’s Defense, you hit.

• If the result is 2x the target’s Defense, you hit 2x and deal +2 damage.

• If the result is 3x the target’s Defense, you hit 3x and deal +4 damage.

That’s it.  That’s the whole mechanic.

Modifiers

• Increase your Penetration die by 1 size if you are a Fighter.

• Increase your Penetration die by 1 size if you have a magic weapon.

• Increase damage by 1 point if you are strong.

• If you have a situational bonus to hit, decrease their Defense by 1 point.

Defense

Unarmored = 1 (everything hits)

Leather = 2

Chain = 3

Plate = 4

Dragon = 5

There’s a satisfying effect here: against unarmored enemies, all weapons are equally likely to hit.  However, against heavily armored enemies, daggers (and other small weapons) become almost useless.  (The big advantage of daggers is that they can be concealed, thrown, and used in a grapple.)

When you get a situational bonus, you decrease their Defense instead of upgrading your Penetration die.  This is to benefit small weapons (like daggers) and non-fighters.  If you have a situational advantage against a person in leather armor, a dagger is as good as a sword–which kinda makes sense.

Some side effects of this system:

• Attacks hit more often, so you’ll need to increase HP if you want combat to take a similar number of rounds.  Alternatively, keep HP the same if you want combat to be shorter than what you’re used to.  (For monsters, I’m going to try 5 HP per level and see how that feels.)

• Physical weapons got a buff, but magic didn’t.  As a result, magic damage will feel weaker than what you might be used to.  This might actually be a feature if you want to push your wizard players towards using non-damaging spells.  It might be a bug if you want your wizard to be the nuke.

• The scaling between armor types is sharper here.  Plate is stronger than what you are used to, and leather is much weaker.  Chain is about the same.

Adding Complexity: Double Dice

Okay, maybe you want something a little more interesting?  Let’s change it to a pair of dice rolls.

	Penetration	Damage Die
Dagger	d4	d6
Sword	d6	d6
Greataxe	d6	d8

Once rolled, these dice are not fixed.  You can switch them freely.

This makes it even easier to hit your targets now.  It might look like you’ll be doing a little less damage, but since you can arrange your dice so that (if both dice are equal-or-higher-than the target’s Defense) the bigger die is the damage die, that doesn’t end up being the case.

The modifiers are the same as above.  2x and 3x hits each add another d4 of damage.

Monster Attacks

Some speculative conversions.

	Penetration	Damage Die	Flat Damage
Goblin	d6	d4	3
Bandit	d6	d6	4
Bear	2 x d6	d8	4
Orc	d8	d8	5
Ogre	d10	d10	6
Owlbear	3 x d6	d8	5
Giant	d12	d12	7
Dragon	3 x d10	d8	5

Adding Complexity: Mighty Maneuvers

Fighters have a chance to do cool things with their attacks, for free.

Beginning at level 2, Fighters get a third die to roll, called the Mighty Maneuver die.  This is a d4 at level 2, but it becomes a d6 at level 4.  (If you have a d5, you can use that for level 3.)

The fighter will roll all 3 dice, and assign each one to a task: Penetration, Damage, and the Mighty Maneuver.  After damage is dealt, the value showing on the Mighty Maneuver die becomes the DC for the enemy’s save to avoid the Fighter’s combat maneuver.  You still need to hit your target in order to attempt a Mighty Maneuver.

Enemies usually use a d6 to resist, or a d8 if they’re good at it.  And a lot of actions are impossible.  (You’ll never shove a dragon, for example.)

Example:

Frollo the Fighter attacks, and therefore rolls all three dice: 4, 5, 6.  The target has a defense of 3 (chain).  He decides to use the 4 for Penetration (a hit!) and the 5 for damage.  The 6 becomes Frollo’s trip attempt.

His enemy, the evil unicorn Hexodia, is not easily tripped with four legs.  The unicorn rolls a d8 to avoid being tripped, but gets a 5.  This is less than Frollo’s 6, and so the unicorn topples with a surprised neigh.

Alternatively, Frollo could have used 6 for Penetration (a double hit!) and 1d4+4 for damage.  (The extra 1d4 comes from the second hit).  This would have left the 5 for the Maneuver.  Since the unicorn also rolled a 5, it would not have been tripped.

Why Would Anyone Use This System?

Compared to regular D&D, there's less math and smaller numbers, so attacking is a little simpler. Attack rolls are probably faster for everyone except the fighter. And attacks miss less often, so combat feels faster.

Compared to Into the Odd, it allows for smoother scaling of enemy difficulty. In ItO, enemy Armor affects your hit chance and reduces your damage (effectively double-dipping). In Pennetra, enemy Defense mostly reduces your chance to hit, but because you often switch dice to land the hit, the hits tend to be smaller as well, so Defense functions as a subtle (and milder) form of damage reduction.

It has diminishing returns on strong attackers, which is nice. Even if you get your Penetration die up to d12 (or d20), you'll still miss occasionally against an armored foe.

I think it preserves the intended differences between the different weapon types, while still giving people a reason to carry a dagger.

And it makes Fighters feel cool. They get something that no one else does.

Discussion

You could take this a step further, and add a fourth die that improves your Defense for the next round.  There’s a couple of ways to do this, but I don’t like any of them very much.  

I probably would let a player take a total defense action, though, and gain +1 Defense at the cost of forfeiting all other actions.

Expect some hesitation as players try to figure out which configuration does the most damage.  (It’s not too hard.  An extra hit is worth 2.5 points of damage.)  Is this decision interesting and meaningful?  Maybe.

It’s more interesting for fighters, since they have to choose between dealing more damage and doing something cool.  It could potentially lead to some situations where a fighter focuses more on the maneuver and less on the damage, which is cool.  

I like fighters to be: 

• Simpler than other classes.

• More spontaneous.  Instead of declaring what spell you are casting, a fighter is largely reacting to openings that the enemies give.

• Good at doing several things in combat, not just damage.

Domain Expansion

Actually, you could rip out the engine from Pennetra and apply it to other types of resolution mechanics. Example: crafting.

When you craft something, roll a Materials die, Tools die, and a Skill die. The results are assigned to your three goals of Quality, Efficiency, and Time. (Low Efficiency means that you end up using more raw materials than you thought you would. High efficiency means that you have some left over.)

If you think of any other fun applications, post it in the comments.

Some Classes

GLOG-adjacent.  Fighters and barbarians are both durable, but they’re different kinds of durable.

Fighters 

Fighters upgrade their Penetration die by 1 step.

Level 1 - Defend

Level 2 - Mighty Maneuvers 1d4

Level 3 - Extra Attacks

Level 4 - Mighty Maneuvers 1d6

Defend

Once per round, you can intercept a physical attack that was meant for an adjacent ally.  You take all of the damage that they would have taken.  You can declare this after damage is rolled.

Mighty Maneuvers

See above.

Extra Attacks

When fighting multiple enemies, a Fighter can attack two enemies at once.  They will roll all three dice at the same time.  A Penetration die is assigned separately to each enemy, and the third die is used for Damage.

Alternatively, the third die can be used for a Mighty Maneuver, performed against both enemies simultaneously.

Barbarians

Barbarians get more HP than fighters, but they can’t wear armor.  Like Fighters, they also upgrade their Penetration die by 1 step.

Level 1 - Rage

Level 2 - Quaff

Level 3 - Mighty Strength

Level 4 - Mighty Rage

Rage

Increase your damage die by 1 step, but you cannot take any actions that aren’t part of an action to directly murder your enemies.  Rage ends when all enemies are subdued or driven off.  Once per round, you can attempt to end it early with a 2-in-6 chance of success.

Quaff

You drink down some booze.  It heals for you for 1d6+[Level] HP, but you get drunk.  For the next hour, if you ever (1) make an attack roll (2) and miss (3) and get doubles, you suffer a fumble.  Your weapon breaks, an enemy gets a free attack against you, etc.

Mighty Strength

You can do some magnificent feat of strength 1/day, like rip a door off its hinges.  If used to intimidate, you get a large bonus.  This ability isn’t useable in combat.

Mighty Rage

Your rage improves, increasing your damage die by another step when raging.

Deconstructing Healing, Potions, and Shrines

Potions kinda suck and I can prove it.

Potions Suck #1

Healing potions kinda suck the fun out of the game for me.  I know most OSR games don't allow them to be purchased, which is good, but a lot of games allow you to stockpile them.  And when you find them, you almost have to bring them along--they're too useful to leave behind since HP is such a critical resource.  They may replace more interesting items in your inventory.

Potions can also feel a little antithetical to dungeoncrawling, too.  Since dungeoncrawling is all about resource management, and potions are a (potentially) uncontrolled resource, players may walk into the dungeon with 0 potion or with 10.  This isn't necessarily a problem--the group with more potions will just delve deeper, and you could argue that they've earned it.

Dark Souls had the right idea.  Estus flasks limit your healing to a fixed amount.  And they're easy to refill, ensuring that a failed first attempt doesn't sink your second attempt.

Potions Suck #2

They're also kinda contrary to the fiction.  Conan never sucked down a healing potion in the middle of combat, much less as a bonus action.  Healing potions don't come from fantasy fiction, they come from video games.  

(UPDATE: I'm probably wrong about this, since potions were in '74 OD&D.  But I don't feel wrong.)

Potions Suck #3

Adventures are designed around their systems, so systems with lots of access to healing potions tend to require more healing.  That's why you see so many unavoidable-unless-you-roll-high traps in 3rd edition dungeons.  This feedback loop creates traps and combats that function as a HP tax, and the whole party must figure out how they're going to pay it.

If you play 5th edition right now, you need a healer in your party.  Maybe not a singular cleric--maybe you have several characters that all heal their share.  You might say "yeah, that's part of the strategy of making an effective party, and it's fun to make an effective party".  Sure, but it's still a constraint that can prevent people from running the characters they want.  I might want to be a wizard, but if the party needs more healing, you might be able to bully me into a rolling a cleric.

Potions Suck #4

Lots of intra-fight healing also changes the style of combat.  If the party could never heal mid-combat: 

• Combats would go faster.
• If you game was about combat balance, enemies would deal less damage (to compensate).
• Damage would be impactful, because it can't be undone.  (Like every move matters in chess--there's no way to return a captured piece to the board.)

Think about the implications of that.  In a lot of systems, as the party levels up, they get access to significantly more magic healing.  As a result (1) combats take longer, (2) enemies deal more damage per round, and (3) damage is less impactful, since it's possible to "undo" a round by healing back the damage that was dealt.  Laid out like that, it seems like a good argument for less healing in games, not more.

A big part of the reason that we even have healing in games in the first place is just because healers are common in the fiction that we're trying to emulate.  Matching the fiction (and your player's expectations) is important, but it's also important to protect the gameplay.

So why not remove potions entirely?  Well, there are a few reasons.

Healing is Cool #1

Potions smooth out damage for the character who needs it.

We don't always want combat to be maximally impactful.  There's a lot of randomness in D&D, and sometimes you get just unlucky and gets smacked by three goblins in the same round.  Potions are a resource that can be spent to undo some of that bad luck.

Healing is Cool #2

Potions smooth out damage for the whole party.

Think about 4 people going into the dungeon with 10 HP each.  One way of thinking about it: the party has 40 HP.  When it gets low, they need to decide to press on or return to camp.

Except it's not that simple, is it?  One guy gets hit.  Then he gets hit again in the next combat.  Then he's dead.  The other 3 guys weren't hit at all.  A streak of bad luck sank the delve.

But potions hedge that bet.  

If you have 4 people, each with 10 HP, and the party is carrying 3 potions that each heal for 5 HP, then the "party" has 55 HP, and the potions can be consumed by whoever needs them the most.

Through this lens, potions are a form of insurance carried by the whole party.  They're a resource that the party shares, that limits how long they can delve into dungeons. (Although obviously the parties that play better will take less damage, delve deeper, and get more treasure.)

Healing is Cool #3

Potions help balance gameplay between different numbers of players.

One character with 10 HP, carrying 3 potions (5 HP each) = 25 HP for the party.  That's your risk budget.  That's how many rounds of combat you can slog through.  That's how many doors you can open.  That's how much fun you get to have before you need to return to camp.

Two characters with 10 HP each, sharing 3 potions (5 HP each) = 35 HP.  Still higher, but the difference is smaller.  

We can't reasonably re-balance the whole dungeon if the number of players change.  If the group size drops from 4 to 2, you probably can't delve as deep as you used to, but your delves aren't half as short.

If you wanted to remove magical healing from the game entirely, you could.  But with everything else being the same, you'd have to increase everyone's HP to keep the new game comparable to (and roughly compatible with) the old.

Healing is Cool #4

Comebacks are dramatic and satisfying.  It also feels more desperate, when you watch your HP dwindle, then bouy back up after you quaff some red juice.  You can watch your potions dwindle, too.

So how do we keep the good stuff while dropping the bad stuff?  I have a few ideas.

Estus Flasks

In Dark Souls, you lose all of your HP and die.  This can happen because either (a) you were fighting an enemy and got killed before you could drink your estus flasks (health potions), or (b) you were exploring and ran out of estus flasks overall, because estus flasks are limited.  Whenever you get a long rest, you recover all of your estus flasks, and that number is limited.  You don't recover your estus flasks until you take another long rest.

And the more I think about it, the more I like it.  Healing should be a very finite resource that is easily replenished by a long rest.  It's probably the factor that limits the player the most on their delves.  

Estus flasks fit this description, but in the traditional tabletop milieu, some sort of magical healing is probably closer to most people's expectations.

Shrines, Altars, and Temples

Another "problem" in need of fixing is how the game is we handle we handle shrines and altars.  D&D is bursting with ancient shrines and altars.  Oftentimes, they don't do anything.  There's no way to interact with the divinity that is supposed to reside there.  (Sometimes I put treasure on the altar, with a chance for receiving a divine curse if it is stolen, or a small chance for a blessing if a contribution is made, but these are token gestures.)

Anyway, I think I have a better idea.

The Solution

Anyway, here's what I've come up with.  In a nutshell:

Healing potions are rare (or nonexistent).  Instead, the party shares a pool of magical healing that replenishes every day.

Since the party already has a source of healing, clerics don't necessarily bring a lot of healing, but they give other benefits.  More diverse abilities, perks when healing is used, small improvements to healing, or perhaps they're more similar to holy wizards.

If you're dropped to 0 HP and then recover, you are left with a point of Trauma.  Each point of trauma reduces your maximum HP by an equivalent amount.  The only way to remove Trauma is by putting that character in time-out, and playing a different character for a session.

Damnation by Seb McKinnon

Rules

There's no healing potions.  (Or at a minimum, they are very rare.)

In the past, I've had players able to recover HP outside of fights by eating lunch.  This can be supplemented (or replaced) by prayer.  

People tend to use my mechanics as building blocks for their own mechanics and systems, so I'm not going to present a single mechanic for you below.

Instead, I'm just going to give you a bunch of possible rules and variants, and then tell you why you may want to pick one over the other.

Unlimited Lunch 

The party can Eat Lunch and regain all of their hit points.  This requires 30 uninterrupted minutes.  A single ration is consumed, shared by the whole party.

Discussion: Generally speaking, I don't want healing to be a limiting factor when going from fight to fight.  I usually enjoy the game more when players are usually able to enter the next fight at full HP.  It allows everyone more freedom to contribute (if you have 1 HP, you kinda have to stay in the back) and allows parties to recover from mistakes better.

However, maybe this is undesirable?  See below.

Lunch + Fatigue

As above, except that whenever you benefit from Eating Lunch, you also gain X points of Fatigue, where X is your level.  Each point of Fatigue reduces your maximum HP by an equal amount.

Fatigue only goes away when you get a good night's sleep.

Discussion: The purpose of fatigue is to place soft limits on how long you can dungeoncrawl for.  If your system already has other types of depletion (torches, spells, etc), you probably don't need this mechanic, unless you want to turn the screws tighter.

Faith Points

The party has 3 FP.  They can spend 1 FP to pray for someone to recover HP.  To pray, you have to touch the person you are praying over.  (You can pray for yourself.)  The person you are praying over recovers 1d6+X HP, where X is equal to the highest level character in the party.

Discussion: Faith Points are the simplest implementation of this idea.  Basically just estus flasks shared by the whole party, with minimal scaling.  You can easily elaborate on this idea, and I will.

Faith Dice

Each party has a fixed number of Faith Dice (FD) that they spend for prayer.  

The party starts with 0 FD, but the maximum amount of FD increases by 1 each time you make a significant sacrifice at a church, temple, or shrine.  For something to count as a meaningful sacrifice, it needs to be something that is painful to lose, e.g. a real sacrifice.  

A "significant" sacrifice is relative to the party's situation.  A rich party in a city would have to donate a lot of money to the church.  A starving party trapped in a dungeon could achieve the same benefit by sacrificing their last ration.  High level parties will also require larger sacrifices than lower-level parties.  (When in doubt, the DM should default to open rulings, e.g. "I'm not sure that your donkey counts as a significant sacrifice.  I'd say it has a 2-in-6 chance of being accepted.  Do you still want to sacrifice your donkey?")  A gem worth 1000s always counts as a significant sacrifice, as does a sword +1.

FD are spent exactly like MD, but they can only be spent on cure light wounds.  You can invest multiple FP in a single spell, e.g. investing 2 FD gives you spell that heals for 2d6+2 HP.

Once you've made four significant sacrifices, your maximum FD is 4.  You cannot increase your FD any further.  The party may have obtained all 4 FD from the Holy Church of Goodness, or (more likely) a mixture of different types of deities and religions.

No Free Replenishment of Faith Dice

As above, except that FD do not replenish for free at the start of each day.  Instead, you must make a small sacrifice at a shrine (of any type) to recover your FD (of all types).

Discussion: This rule moves the game further away from dungeon-as-sport and forces the players to plan more around the location of shrines.  Depending on what type of game you want to run, this can be a good thing (random shrines in dungeons become more relevant) or a bad thing (one more chore to do before you're ready for dungeon delving).

Why are the players able to pray at an evil shrine and recover FD to cast good spells?  In my mind, it's because the gods/religions are all part of the same pantheon, and the gods prefer piety in mortals.  But you may want to limit this in your own campaigns.

Faith Dice + Limitations

As above, except that you can only regain FD by praying at a shrine, temple, or church of a deity that you worship.  You don't have to make sacrifices, just participate in an 1 hour ritual.  

If you pray at one shrine belonging to a god that you worship, you recover all of your FD.

If you ever disobey the tenets of one of your gods, you lose all of the FD that you gained from that religion.

Discussion: There's an interesting choice to be made here.  If you worship more gods, you have more options on where you can pray for healing.  But if you get all of your FD from a single location, you'll have fewer restrictions on your behavior.

Faith Dice + Clerics

As above, plus clerics essentially function as a mobile shrine.  If you don't have a shrine available, you can perform a 1 hour ritual with a cleric once per day to recover your FD.

Each cleric in your party increases the maximum number of FD by 1, as long as at least one of those FD are from the appropriate religion.

Clerics no longer have access to cure light wounds or its analogues.  (However, the party gets more healing overall since the maximum FD is increased.)

Discussion: The idea is to move clerics away from just being healbots.  Since everyone can heal, clerics are freed up to do more interesting things.  Remove cure light wounds from the cleric spell list and put something more interesting in there.

I realize that this may be the rule that gets the most opposition, but I think it's also the most interesting one.

Faith Dice + Unique Spells

As above, plus if you make a significant sacrifice at a shrine or temple, write down the shrine's spell list.  (There are typically ~3 spells on it.)

FD can be spent on healing or on one of these spells.

Example: Church of the First Emperor: cure poison, turn undead, protection from evil

However, each of these spells can only be cast once.  Once you cast it, draw a line through it.  You cannot cast it again unless you make a significant sacrifice at the appropriate shrine.  Whenever you gain new spells at a shrine, you lose access to any prior spells you may still have.

Discussion: There's a small-but-interesting decision here.  To be most efficient, players will not want to sacrifice at the same temple twice until they've had a chance to use all of the spells gifted by that shrine.  Additionally, this can serve as a money sink for high level parties.  If you have extra 1000s gems to sacrifice, eventually you'll be making major sacrifices each time you're in town in order to refresh your spell list.

No Lunch

In this formulation, you no longer gain HP when you Eat Lunch.  Instead, Praying is used for healing both inside and outside combat.

When you use Prayer to regain HP outside of combat, you recover an additional +1 HP per die.

Discussion: This creates a small-but-interesting decision.  It's more effective to heal outside of combat since you'll recover more HP on average, but it may be more urgent to heal in combat for less HP.