TYPE
Artifact

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

FLAVOR TEXT
"Properly installed, each powerstone emits a targeted electromagnetic field that halts momentum as sure as stone." —*Tome of Obstructions*

ILLUSTRATOR
Mark Tedin

LEGALITIES
Standard Future Historic Timeless Gladiator Pioneer Explorer Modern Legacy Pauper Vintage Penny Commander Oathbreaker Standardbrawl Brawl Alchemy Paupercommander Duel Oldschool Premodern Predh

LANGUAGES
EN FR DE IT JP KR PT RU ES ZH-CN ZH-TW

RULINGS

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