Okaun, Eye of Chaos

Partner with Zndrsplt, Eye of Wisdom (When this permanent enters the battlefield, target player may put Zndrsplt, Eye of Wisdom into their hand from their library, then shuffle.)
At the beginning of combat on your turn, flip a coin until you lose a flip.
Whenever a player wins a coin flip, double Okaun's power and toughness until end of turn.