Chrollo, Mairsil's Abomination

Chrollo costs {1} less to cast for each color among permanents your opponents control.
When Chrollo enters the battlefield, for each
player, exile up to one target creature that player controls and put a cage counter on it.
Your opponents can't activate abilities of
permanents they control that share a color with a
multicolored card they own in exile with a cage
counter on it.