Entropic Jolt

As a Reaction to taking magical damage from a successful attack roll, you immediately manifest a field of Void energy. You reduce the triggering damage by 4d10 + your spellcasting ability modifier. Your attacker takes 4d6 of the same damage type that triggered the spell. When you cast this spell at 5th level or higher, the reflected damage increases by 1d6, to a maximum of the original, pre-reduction total of the triggering damage. Immediately after reducing the damage, you can teleport up to 45ft. to a location which you can see. 

Casting at higher levels: When cast at a spell level greater than 4th, you deal an additional 1d6 reflected damage of the triggering attack's type. This cannot exceed the total original damage of the attack.