Cone of Crab

You unleash a blast of crab. Each creature in a 69-foot Cone originating from you makes a Constitution saving throw, taking 8d8 Crab damage on a failed save or half as much damage on a successful one. A creature killed by this spell becomes a crab until it memorizes the crab rave dance.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 2.