Conjuro
Este hechizo tiene la habilidad de destello mientras haya cinco o más valores de maná entre las cartas de tu cementerio.
Regresa la carta de criatura objetivo de tu cementerio al campo de batalla.
The game checks whether it is legal to cast a spell before costs are determined or mana abilities are activated while casting it. If cards are removed from your graveyard after that point, such as by exiling Jack-o'-Lantern from your graveyard to pay for its mana ability, this won't affect whether you can legally cast Graveyard Shift, even if that reduces the number of mana values in your graveyard to below five.