Tribute To The Aztec Sun Gods

As an additional cost, reveal two Aztec cards
from your hand: Each player draws X cards.
At the beginning of your upkeep, You may
exile this card from your graveyard: Until
end of turn, if you would draw a card while
your library has no cards in it, you win the
game. You can only activate this ability, if
you have 15 or more Aztec Instant and or
Aztec sorcery spells in your graveyard.