The illithasque can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The illithasque regains spent legendary actions at the start of its turn. Attack. The illithasque makes one claw attack or tail attack. Move. The illithasque moves up to half its speed. Chomp (Costs 2 Actions). The illithasque makes one bite attack or uses its Swallow.