Some abilities, spells, items, and other effects grant resistance that reduces damage, or immunity that prevents it. If the text doesn’t specify whether resistance or immunity applies to physical or magic damage, the effect applies to both.

When a creature has immunity to a damage type, they do not take any damage from an attack that deals damage of that type.

If your character has resistance or immunity plus another way to reduce damage (such as marking an Armor Slot), apply the resistance or immunity first. You can then use other methods to reduce the damage further. If an attack deals both physical and magic damage, you can only benefit from resistance or immunity if you are resistant or immune to both damage types.