Arcane Reversal

You are able to redirect incoming arcane energy to retaliate against those who challenge you on the battlefield.

When you take magical damage, roll [roll]2d8[/roll]. Reduce the incoming damage by this amount and immediately cast a single target spell of 5th level or lower that requires a spell attack roll and has only one target. casting this spell does not use an additional spell slot.

The chosen spell is up-cast to level 5 if it is not a 5th level spell already and it must target the caster of the original attack. You may also choose to cast a cantrip that is a single target spell attack instead.

Your spell attack roll is made at advantage. You must be otherwise able to target the original caster with the chosen spell abiding by all relevant limitations (range, sight, etc...)

If you hit with this attack, add damage of the same type as the spell you are casting equal to the damage negated from the original spell.

For each level above 7th level add 2d8 to the dice roll to determine damage negated and dealt.