An ethereal head of a greataxe launches from your hands and is rotating extremely fast. Each creature in a 60-foot cone must make a Constitution saving throw. A creature takes 8d8 force damage on a failed save, or half as much damage on a successful one. The caster takes a quarter of the damage dealt (half the damage rolled, the half the damage again rounded down.)

A creature killed by this spell is cut in half.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 4th.