No Easy Way Out

Prerequisite: Fiend Pact Warlock
"You don't think I'd let you go that easily, do you?"

Immediately before you take damage, you can use a reaction to cause a random ally within 60ft to take it instead of you, as psychic damage. You must decide to do this before the amount of damage is declared. Once you use this ability, you can’t do so again until you finish a short or long rest.