Chen, the Holy Knight

Partner with Zharvakko, the Witchdoctor. (When
this creature enters the battlefiel, target player may put Zharvakko into their hand from their library, then
shuffle.)
{t}{2}{g}: Penace! Choose target creature or player.
Until end of turn, creatures attacking target
creature or player gain doublestrike.
If you control Chen and Zharvakko at
the beginning of your upkeep, you win the game.