The tarrasque can take 2 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 tarrasque regains spent legendary actions at the start of its turn. Attack. The tarrasque makes one claw attack or tail attack. Move. The tarrasque moves up to half its speed. Like a normal tarrasque , but it has awakened prematurely and is in a weakened state. 0.