The Gelatinous Cube is a powerful level 4 monster. It performs a different shot sequence over four rounds in the Battle Phase.
In the first round, the Overseer rotates the Cube piece to the corrosion melee shot icon. Then, the Overseer takes a basic melee shot and then another melee shot with the corrosion shot modifier. The Overseer repeats this process for three subsequent rounds for: the fear melee shot, the devour melee shot, and the critical melee shot. Then, the sequence starts over with the corrosion melee shot modifier.
The Gelatinous Cube Monster’s shot sequence goes as follows:
Round 1: Corrosion
Round 2: Fear
Round 3: Devour
Round 4: Critical