Devastate Undead

You send forth a beam of crackling negative energy that streaks toward an undead ally creature within range, destroying them. For each undead ally destroyed in this manner, you channel the negative energy into yourself, thereby restoring 2d10 hit points or temporary hit points if already at full health.

The spell creates more than one beam when you reach higher levels: two beams at 5th level, three beams at 11th level, four beams at 17th level, and five beams at 20th level. You can direct the beams at the same target or at different ones.

Undead creatures of CR9 or above require 3 beams to be destroyed, and undead creatures of CR18 or above require 5 beams.

Living creatures are immune to the effects of this spell and if you are a living being yourself, you receive this negative energy as damage instead.