Possibility Storm&Zoetic Cavern
AP controls Possibility Storm. Then he casts Zeotic Cavern face down as a creatue spell. What will happen when the ability of Possiblity Storm resolves? Exile until a creature card or a land card?
Possiblity Storm 3RR
Enchantment
Whenever a player casts a spell from his or her hand, that player exiles it, then exiles cards from the top of his or her library until he or she exiles a card that shares a card type with it. That player may cast that card without paying its mana cost. Then he or she puts all cards exiled with Possibility Storm on the bottom of his or her library in a random order.
Zeotic Cavern
Land
{T}: Add {1} to your mana pool.
Morph {2}