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
Jonas De Ro
Rulings
In Two-Headed Giant, spells don't cost extra on your own turn.
(wotc • 2006-05-01)
The additional cost can be reduced by effects that reduce costs, such as Sapphire Medallion.
(wotc • 2004-10-04)
Rulings
In Two-Headed Giant, spells don't cost extra on your own turn.
(wotc • 2006-05-01)
The additional cost can be reduced by effects that reduce costs, such as Sapphire Medallion.
(wotc • 2004-10-04)