If a target has resistance to a damage type, then they reduce incoming damage of that type by half before comparing it to their Hit Point Thresholds. If the target has additional ways of reducing incoming damage, such as marking Armor Slots, they apply the resistance effect first. The effects of multiple resistances to the same damage type do not stack.
If a target has immunity to a damage type, they ignore incoming damage of that type.
If an attack deals both physical and magic damage, a character can only benefit from resistance or immunity if they are resistant or immune to both damage types.
Direct damage is damage that can't be reduced by marking Armor Slots.