Erupting Shell

You touch a willing creature, and a warm-red translucent shell surrounds the target until the spell ends. The target gains a +2 bonus to AC. The target also sheds bright light for 5ft and dim light for an additional 5ft. When the spell ends the shell erupts, each hostile creature within a 5-foot sphere must make a Dexterity saving throw. A creature takes 2d6 fire damage on a failed save, or half as much damage on a successful one. You may end this spell as an action.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.