My brother says there's a card that lets u control target player for the rest of the game but all I know is there's a planeswalker and an artifact that does it but only for one turn
I know the one turn cards, but never heard
Never heard of anything else
I think jester posted that combo a while back check the combo corner
There are ways, typically using {Mindslaver}. But there are only two individual cards that let you control a player. The slaver, and {Sorin Markov}.