Name:Powerstone token
ManaCost:no cost
Types:Artifact Powerstone
Colors:colorless
A:AB$ Mana | Cost$ T | Produced$ C | RestrictValid$ CantCastNonArtifactSpells | SpellDescription$ Add {C}. This mana can't be spent to cast a nonartifact spell.
Oracle:{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.