Absorb Elements

The spell captures some of the incoming energy.
You have resistance to the triggering damage type
until the start of your next turn. Also, the first
time you hit with a melee attack on your next
turn, the target takes an extra 1d6 damage of
the triggering type, and the spell ends.
[+1d6 per slot above 1st]
(* a reaction you take when you take acid,
cold, fire, lightning, or thunder damage)