If Cthulhu (Hoary Wings) is in play:

The investigator with the highest tests (X), where X is Cthulhu's Rage. If they fail, they take 1 damage or 1 horror.

If Cthulhu (Fierce Visage) is in play:

Each investigator at Cthulhu's location loses 2 resources.

If Cthulhu (Wicked Claw) is in play:

The investigators must decide, as a group:

- Each investigator loses 1 action during their next turn.

- Cthulhu (Wicked Claw) attacks each investigator at its location.

- Each investigator takes 1 direct horror.