World Championship Decks 1999

Temporal Aperture

{5}, {T}: Shuffle your library, then reveal the top card. Until end of turn, for as long as that card remains on top of your library, play with the top card of your library revealed and you may play that card without paying its mana cost. (If it has X in its mana cost, X is 0.)

Urza's Saga

o5, oc
T: Shuffle your library and reveal the top card. Until end of turn, as long as that card remains on top of your library, you may play the card as though it were in your hand without paying its casting cost. (If the spell has o
X in its casting cost, X is 0.)