One of the notable house rules in the White Sandbox campaign is that hit points are rolled only as necessary to absorb a PC’s wounds, making it hard to gauge how much damage a character can or can’t take until their luck is put to the test. I find it easier to show how this works than to explain it. At the table I talk people through each step the first time they’re hit, like so:
Lotur the Scurrilous Cur is 3rd level, so he has three hit dice. We imagine each of these as representing a different aspect of his ability to stave off death: mental, spiritual, and physical. Because he was fully healed since his last adventure, we don’t know how many hit points he gets from each dice.
Not five feet into the dungeon, Lotur is hit by a gnoll’s arrow and takes six points of damage. The player notes on Lotur’s sheet that he has taken 6 points of wounds, and starts rolling his hit dice to see if he can absorb the blow.
If Lotur rolls a 6 on his first (mental) hit dice, it absorbs the wound fully. He crosses out that hit dice – we imagine that he’s run out of plans for dealing with gnoll ambush – and leaves the other two untouched and unknown. Unfortunately, he only rolls a 2. He crosses out his mental hit dice, and has four points of incoming damage left to absorb. He rolls a 1 with his second (spiritual) hit dice: he crosses it out. We imagine that he is demoralized, and still has three points of incoming damage.
For his last (physical) hit dice, Lotur rolls a six! He subtracts the three points of incoming damage, and notes that he has three hit points left on this dice. However, at this point we imagine that he is actually bleeding and has an arrow sticking out of him.
Oops, here comes another arrow! This one rolls a 2 for damage. We already know that Lotur has three physical hit points left, so he doesn’t need to roll any hit dice. His player crosses off two of the hit points remaining on Lotur’s physical hit dice, and increases his total wounds taken from 6 to 8.
Salvation arrives in the form of a cleric. Each point of healing delivered by the cure spell will subtract one from Lotur’s wound total. If the cleric rolls eight or more points of healing, all Lotur’s wounds are erased and all three of his hit dice are reset. However, the cleric only rolls a 3, so Lotur increases the hit points remaining on his physical hit dice from 1 to 4, and decreases his total wounds from 8 to 5.
Note that poisoned arrows have to get through to the physical hit dice to be effective, so there’s a benefit of having that dice untouched; and some kinds of healing will add to your spiritual or physical hit dice, but won’t work if those dice have been crossed off.
To answer some questions that tend to come up:
– When a character has more or fewer levels than they do physical/spiritual/mental hit dice, we assign extra or missing hit dice to one of the three categories depending on class. A fighter gets an extra physical at L4, a cleric an extra spiritual, etc. Then spread out until at L6 all classes have two of each.
– Once a character’s hit points have all been rolled, these rolls are kept only as long as they have wounds. When all wounds are removed, hit dice reset to unknown.
– High constitution provides a buffer after you run out of hit dice. Characters that are tough get 1 HP per hit die of buffer; exceptionally tough characters get 2 per die. So if a 3rd level PC rolled 12 for their HP, a tough one could actually take 15, and an exceptionally tough one 18, before collapsing.
This idea was inspired by Zulgyan’s method of rolling monster HD, and realizing that most of the d6’s I have are either red, green, or white, which I assigned to physical, spiritual, and mental.
I like this approach because it makes taking damage an exciting dice-roll contest between player and monster. As per Gary’s house rules we’ve started with third level characters, so when a PC is hit by a lizardman spear for 6 damage, there’s a dramatic sequence of rolls: does their knowledge of fencing techniques cover this? No, they roll a 2 for their mental hit dice, so there’s 4 points of damage remaining, and their plan for survival is in shambles. Is their esprit de corps sufficient for them to simply knock the spear aside? No, they roll a 2 for their spiritual hit dice, so there’s still 2 points of incoming damage and they’re demoralized. OK, are they hale enough for them to survive this thrust? No, they roll a 2 for their physical hit dice and die!
I also like the way that doing this helps imagine what different states of being wounded are; it helps systematize the idea that hit points represent divine favor and luck as well as sheer toughness.
In play it does take a little longer to resolve PCs taking damage than if players were just subtracting a number from the HP written on their sheet. It did mean that the math involved was a lot easier – take the # of damage dealt, subtract from 1 to 6, repeat. Plus, I feel like the risk of a player dying is worth spending extra spotlight time attending to, and I like how not knowing what your hit points are before they’re tested means that every wound carries the possibility of death. If a 3rd level character rolled a string of 1’s for their hit dice and was going to be stuck with that forever, I’d certainly let them re-roll, but this approach means that although such bad luck might mean your character gets sent to the graveyard, it doesn’t mean that you might as well roll up a new one even before they start adventuring.