Grimalkins can be killed but do not die naturally. They are immune to diseases of non-magical origin. Grimalkins also cannot die of thirst or starvation, though a lack of sustenance drives them desperate and sadistic.

Grimalkin have innate faerie magic. Choose 1 Glamour.

Action. You can transform into a harmless tiny cat, as a Stormshifter's Beastshift but you can only talk to cats. Once per Safe Rest, you can turn into a Wilder instead.

Wilder (Medium). Transform into a medium cat. Attacks against you have disadvantage 2 (damage suppresses this until the end of your next turn). You can only attack with Vicious Claws. Vicious Claws. Action: 1d4+LVL piercing damage.