Defense Grid
Artifact
Each spell costs 
more to cast except during its controller's turn.
It lights up the sky, beckoning enemies only to repel them.
イラスト：
Ninth Edition#293レア英語適正
裁定
2004年10月4日
The additional cost can be reduced by effects that reduce costs, such as Sapphire Medallion.
2006年5月1日
In Two-Headed Giant, spells don’t cost extra on your own turn.