Dark 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 player discards a card. You can not target a player with
no cards in hand. Then those that have no cards
in hand draws a card and lose 1 life.