Blood Warden

If you have 20 cards in your graveyard, 5 artifacts
under your control, 10 creatures under your
control, and 15 lands under your control, you win
the game.
Cast this enchantment only if two of the 4
criteria of this win condition have already been
met. This enchantment has hexproof until 3 of
the 4 criteria have been met. You cannot lose the
game as long as you control a nonland permanent.