Stone Retrieval Unit [The Brothers' War] 150 Set: Expedition: Base Set Type:

Set: Expedition: Base Set Type: Lightning Rarity: Rare Retreat cost: Colorless

Set: Sword & Shield: Silver Tempest Type: Supporter Rarity: Promo

Then you may exile Flitting Guerrilla

When Angel of Salvation enters the battlefield

Set: Unknown Event Type: Artifact Creature — Dragon Rarity: Common Cost: {7} Flying

Stone Retrieval Unit [The Brothers' War] 150 Set: Expedition: Base Set Type:Set: The Brothers' War Type: Artifact Creature Construct Rarity: Common Cost: {4} When Stone Retrieval Unit enters the battlefield, create a tapped Powerstone token. (It's an artifact with {T}: Add {C}. This mana can't be spent to cast a nonartifact spell.) Automatons could be rebuilt. Powerstones could not.