Worn Powerstone [Commander 2018] SM165 You can only use this

You can only use this effect of "Guardragon Elpy" once per turn

or your side of the field to the Graveyard

Set: Astral Pack 5 Card type: Normal Spell Rarity: Common If you have 5 or more "Spellbook" Spell Cards in your Graveyard: Excavate the top 2 cards of your Deck

Set: Black & White: Dark Explorers Type: Grass Rarity: Rare Retreat cost: Colorless

Set: Battles of Legend: Relentless Revenge Card type: Continuous Trap Rarity: Secret Rare The first time

Worn Powerstone [Commander 2018] SM165 You can only use thisSet: Commander 2018 Type: Artifact Rarity: Uncommon Cost: {3} Worn Powerstone enters the battlefield tapped. {T}: Add {C}{C}. Even a fragment of a powerstone contains within it not just energy, but spacevast dimensions trapped in fragile crystal.