Not all damage is inflicted equally. Here are some of the forms of damage that can be inflicted:
Physical damage is dealt by most weapons, physical hazards, and natural attacks. The main types of physical damage are bludgeoning, piercing and slashing.
Ballistic damage comes from extreme force, usually caused by a firearm.
Bludgeoning damage comes from weapons and hazards that deal blunt-force trauma, like the impact of a haymaker or being dashed against rocks.
Piercing damage is dealt from stabs and punctures, whether from a monster's fangs or a piercing knife.
Slashing damage is delivered by a cut, be it the swing of the sword or being tossed into a lawnmower's spinning blades.
Ghosts and other incorporeal creatures have a high resistance to physical attacks that aren't magical (attacks that lack the magical trait).
Many spells and other supernatural effects deal energy damage to their targets. Energy damage is also dealt from effects in the material world, such as the biting cold of a blizzard to a raging forest fire. Some weapons also do energy damage, such as a flamethrower or a concussion grenade. The main types of energy damage are acid, arcane, cold, corruption, electricity, fire, force, psychic, radiant, sonic and void.
Acid damage can be delivered by gases, liquids, and certain solids that dissolve flesh, and sometimes by harder materials. Acid is associated with the element of Earth and the colour green.
Arcane damage involves raw magical energy being unleashed to react with the natural world. Arcane is associated with primal chaos and the colour purple.
Cold damage freezes material by way of contact with chilling gases and ice. Cold is associated with the element of Water and the colour blue.
Corruption damage involves the unmaking, twisting or corruption of reality. It is used by demons, outsiders, warlocks and cultists. This damage type is typically not available to players. Corruption is associated with forces antithetical to creation and sickly colours not naturally appearing in nature.
Electricity damage comes from the discharge of powerful lightning and sparks. Electricity is associated with the element of Air and the colour yellow.
Fire damage burns through heat and combustion and includes both explosive bursts and lasers. Fire damage is associated with the element of Fire and the colour red.
Force damage involves aether formed into incredibly hard, but nonsolid, shapes. Force is associated with the primal forces of law and order and the colour grey.
Psychic damage attacks the target's mind or soul through fatigue, emotional trauma, bouts of madness, or psychosomatically inflicting physical harm. Mindless creatures are immune to psychic damage. Psychic damage is usually associated with the colour pink.
Radiant damage channels the power of light and justice, manifesting as beams of light, sheets of damaging colours, and fonts of radiance. Radiant is associated with the forces of the Empyrean and the colour white.
Sonic damage assaults matter with high-frequency vibration and sound waves. Sonic damage is usually associated with the colour teal.
Void damage channels the natural powers of death and destruction, involving swirling shadows that deaden flesh and cause material to erode and decay rapidly. Void is associated with the forces of Shadow and the Underworld and the colour black.
In some instances, opposing energy types can cancel each other out or be used in counter-spells. Opposing energy types are as follows:
Acid and electricity
Arcane and force
Cold and fire
Corruption and radiant
Persistent damage comes from effects like acid, being on fire, or many other situations. It appears as “X persistent [type] damage,” where “X” is the amount of damage dealt and “[type]” is the damage type. Instead of taking persistent damage immediately, you take it at the end of each of your turns as long as you have the condition, rolling any damage dice anew each time. After you take persistent damage, roll a DC 15 flat check to see if you recover from the persistent damage. If you succeed, the condition ends.
Persistent damage runs its course and automatically ends after a certain amount of time as fire burns out blood clots, etc. The GM determines when this occurs, but it usually takes 1 minute.
You can take steps to help yourself recover from persistent damage, or an ally can help you, allowing you to attempt an additional flat check before the end of your turn. This is usually an activity requiring 2 actions, and it must be something that would reasonably improve your chances (as determined by the GM). For example, you might try to smother a flame or wash off acid. This lets you attempt an extra flat check immediately, but only once per round.
The GM decides how your help works, using the following examples as guidelines when there's not a specific action that applies.
The action to help might require a skill check or another roll to determine its effectiveness.
Reduce the DC of the flat check to 10 for a particularly appropriate type of help, such as dousing you in water to put out flames.
Automatically end the condition due to the type of help, such as healing that restores you to your maximum HP to end persistent bleed damage or submerging yourself in a lake to end persistent fire damage.
Alter the number of actions required to help you if the means the helper uses are especially efficient or remarkably inefficient.
Venoms, toxins, and radiation can deal poison damage, which affects creatures by way of contact, exposure, ingestion, inhalation, or injury. In addition to coming from monster attacks, alchemical items, and spells, poison damage is often caused by ongoing afflictions.
Another special type of physical damage is bleed damage. This persistent damage represents a loss of blood or other vial fluids, such as glamour or ichor. As such, it has no effect on nonliving creatures (other than vampires) or living creatures that don't need blood to live. Weaknesses and resistances to physical damage apply. Bleed damage ends automatically if you're healed to your full Vitality Points.
Sometimes, you are able to make the most of your attack through sheer precision. When you hit with an ability that grants you precision damage, you increase the attack's listed damage, using the same damage type, rather than tracking a separate pool of damage.
Some creatures are immune to precision damage, regardless of the damage type; these are often amorphous creatures that lack vulnerable anatomy.
The extra damage from a critical hit is considered Precision Damage.
There are five metals that are banes to inhabitants of the supernal planes. Weapons with these damage types bypass a supernal creature's natural resistances and inhibit supernatural regeneration or healing, forcing these wounds to mend as if they were a mortal.
These metals are as follows:
Bronze for the jinn and other inhabitants of Chaos
Iron for the fey and other inhabitants of Faerie
Lead for shades, reapers, and other inhabitants of the Underworld
Orichalcum for horrors and other inhabitants of Shadow
Silver for spirits, lycanthropes and other inhabitants of the Spirit World
Other materials can also have similar properties, such as rock salt being effective against ghosts or aspen wood against vampires. An Occult Lore check can help identify a specific creature's weaknesses.
If you have resistance to a type of damage, each time you take that type of damage, you reduce the amount of damage you take by the listed amount (to a minimum of 0 damage). Resistance can specify combinations of damage types or other traits. For instance, you might encounter a monster that’s resistant to non-magical bludgeoning damage, meaning it would take less damage from bludgeoning attacks that weren’t magical, but would take normal damage from an enchanted hammer (since it’s magical) or a non-magical gun (since it deals ballistic damage). A resistance also might have an exception. For example, resistance 10 to physical damage (except silver) would reduce any physical damage by 10 unless that damage was dealt by a silver weapon.
If you have more than one type of resistance that would apply to the same instance of damage, use only the highest applicable resistance value.
It’s possible to have resistance to all damage. When an effect deals damage of multiple types and you have resistance to all damage, apply the resistance to each type of damage separately. If an attack would deal 7 slashing damage and 4 fire damage, resistance 5 to all damage would reduce the slashing damage to 2 and negate the fire damage entirely.