巫術
只要你墳墓場中牌的魔法力值有五種或更多,此咒語便具有閃現異能。
將目標生物牌從你的墳墓場移回戰場。
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.