Your search for "worn powerstone 235" revealed the following:
Worn Powerstone (Foil) (EMA) from Eternal Masters, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Henry G. Higginbotham Card Text:Worn Powerstone enters the battlefield tapped.T: Add CC to your mana pool.
Worn Powerstone (EMA) from Eternal Masters, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Henry G. Higginbotham Card Text:Worn Powerstone enters the battlefield tapped.T: Add CC to your mana pool.