Defense Grid

{2} · Artifact

Each spell costs {3} more to cast except during its controller's turn.

Motor: se resuelve a mano

Rulings (2)

In Two-Headed Giant, spells don't cost extra on your own turn.
Wizards of the Coast · 2006-05-01
The additional cost can be reduced by effects that reduce costs, such as Sapphire Medallion.
Wizards of the Coast · 2004-10-04