Cannot be damaged except by story card effects.

Forced - At the beginning of the enemy phase, if Hastur is ready: Hastur attacks each investigator, in player order (regardless of their location). If Hastur's attack deals you horror in excess of your sanity, you take 1 damage, as well.

: Test (X), where X is Hastur's fight value. If you succeed, exhaust Hastur. Any investigator may trigger this action.