Ice Gym

When another gym enters the battlefield, exile
this with a visited counter on it. When you
control no gyms, if this is in exile with a visited
counter on it, you may put this in your graveyard.
At the beginning of your upkeep, target X
untapped creatures where X is the number of
differently named gyms in exile. They become
tapped and don't untap during the controller's
next upkeep.