Carnage Blast

When casting the spell, the caster must make a magic attack test, if successful, it launches a red ray in a straight line, on contact it causes 3d10 necrotic damage, if a creature dies as a result of the magic attack, its blood crystallizes and spikes grow from its body, all creatures within a 10 feet radius take damage.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 2.