結界
在每次戰鬥開始時,將每個由你操控之生物的力量和防禦力均加倍直到回合結束。
If an effect instructs you to "double" a creature's power, that creature gets +X/+0, where X is its power as that effect begins to apply. Similarly, a creature whose toughness is doubled gets +0/+X, where X is its toughness as the effect begins to apply.