Oxidize

Exile target creature that dealt damage to you this turn.

This spell costs 1 more to cast for each target beyond the first. Fireball deals X damage divided evenly, rounded down, among any number of targets.

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Discard a card: This creature gets +1/+1 until end of turn. Exile two cards from your graveyard: This creature gets +1/+1 until end of turn.

Counter target spell unless its controller pays 3.