Defense Grid
Artifact
Each spell costs 
more to cast except during its controller's turn.
"Woven together, strands of aether can form a mesh of surprising stability, though such a network tends to pull power from nearby devices." — Consulate engineer's log
イラスト：
Kaladesh Inventions#34神話レア英語適正
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.