doctorhook
Legend
5E-ifying the spirit of the above, my guess is it'll cast as a reaction, like shield. Fire damage? Necrotic would be a li'l more hellish.Probably a safe bet...
Hellish rebuke
warlock (infernal) attack 1
At-Will ✦ Keywords: arcane, fire, implement
Standard Action
Range: ranged 10
Target: one creature
Attack: Constitution vs. Reflex
Hit: "1d6 + Constitution modifier fire damage. The first time you take damage before the end of your next turn, the target takes 1d6 + Constitution modifier fire damage."
Level 21: "2d6 + Constitution modifier damage and extra damage."[PHB:132][U:W]