Invulnerable

Invulnerable grants complete damage immunity for its duration. An Invulnerable unit cannot take any damage from any source, making it the strongest defensive buff in the game. No attack, ability, damage-over-time effect, or environmental hazard can reduce the health of an Invulnerable unit.

Invulnerable is typically short-lived, lasting only one or two turns, and comes from rare abilities or specific triggers. When an enemy gains Invulnerable, skip attacking them and focus on other targets or repositioning until it expires. When your cats gain Invulnerable, use the window aggressively to push into dangerous positions, draw enemy fire, or survive a lethal burst phase from a boss. Note that while damage is negated, status effects and debuffs may still be applied during Invulnerable, so the unit can still be set up for punishment once the immunity wears off.