Helmut Zemo, Agent of Strife

{1}{r}{u/b},{t}: Target creature an opponent controls fights target creature that same opponent
controls. Whenever a creature dies as a result of
combat caused by this ability, put a Strife
counter on Helmut Zemo, Agent of Strife.
At the beginning of your upkeep, if there are 10
Strife counters on Helmut Zemo, Agent of Strife,
you win the game.