待ち受ける禿鷹/Circling Vultures

Creature - Bird
Flying <CR>
You may discard Circling Vultures any time you could play an instant. <CR>
At the beginning of your upkeep, sacrifice Circling Vultures unless you remove the top creature card in your graveyard from the game.

Creature - Bird
Flying <CR>
You may discard Circling Vultures any time you could cast an instant. <CR>
At the beginning of your upkeep, sacrifice Circling Vultures unless you exile the top creature card of your graveyard.