Dark Gatekeeper

Companion - Your starting deck may only have 2
of each card that is not a non basic land.
Shroud,This spell can't be countered
When Dark Gatekeeper enters the battlefield, choose a non land card name. If Dark Gatekeeper leaves the battlefield, return it to the battlefield under its owner's control. It's owners may choose a new non land card name.
Whenever a player casts a spell, or controls of the chosen name, that player loses the game. At the beginning of each player's end step, if the