Brain Explosion

You select four targets that you can see within range all within a 20 foot radius of one another. A target can be any creature with a brain. Objects and creatures without brains such as constructs without their own will are unaffected.

A target must make a Wisdom saving throw. The target takes 10d8 lightning damage on a failed save, or half as much damage on a successful one. If a target is killed by this damage, its head explodes, assuming it has one.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, one additional bolt leaps from the first target to another target for each slot level above 6th.