Thorfinn, Vengeful Wanderer

Haste

Berserker’s Drive — Whenever Thorfinn, Vengeful Wanderer attacks, if you’ve sacrificed a permanent this turn, it gets +2/+2, gains trample, and first strike until end of turn.

Revenge Strike — Sacrifice a creature: Thorfinn deals damage equal to the sacrificed creature’s power to target creature or planeswalker. Activate only once each turn.