法术
只要你坟墓场中牌的法术力值有五种或更多,此咒语便具有闪现异能。
将目标生物牌从你的坟墓场移回战场。
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.