First printed in The Brothers' War (2022)
Slagstone Refinery 
Artifact
Whenever this artifact or another nontoken artifact you control is put into a graveyard from the battlefield or is put into exile from the battlefield, create a tapped Powerstone token. (It's an artifact with "
: Add 
. This mana can't be spent to cast a nonartifact spell.")
Combos
12 combos from Commander Spellbook, the most popular first.
- Infinite colorless mana, Infinite death triggers…: Farid, Enterprising Salvager + Krark-Clan Ironworks + Metalwork Colossus + Slagstone Refinery
- Infinite colorless mana, Infinite death triggers…: Ashnod's Altar + Farid, Enterprising Salvager + Metalwork Colossus + Slagstone Refinery
- Infinite colorless mana, Infinite death triggers…: Krark-Clan Ironworks + Metalwork Colossus + Slagstone Refinery + Sly Requisitioner
- Infinite colorless mana, Infinite death triggers…: Ashnod's Altar + Metalwork Colossus + Pitiless Plunderer + Slagstone Refinery
- Infinite colorless mana, Infinite death triggers…: Krark-Clan Ironworks + Metalwork Colossus + Pitiless Plunderer + Slagstone Refinery
- Infinite colorless mana, Infinite death triggers…: Ashnod's Altar + Metalwork Colossus + Slagstone Refinery + Sly Requisitioner
- Infinite colorless mana, Infinite death triggers…: Ashnod's Altar + March of the Machines + Slagstone Refinery + Sword of the Meek + Unctus, Grand Metatect
- Infinite colorless mana, Infinite death triggers…: Krark-Clan Ironworks + March of the Machines + Slagstone Refinery + Sword of the Meek + Unctus, Grand Metatect
- Infinite colorless mana, Infinite death triggers…: Chief of the Foundry + Krark-Clan Ironworks + March of the Machines + Slagstone Refinery + Sword of the Meek
- Infinite colorless mana, Infinite death triggers…: Krark-Clan Ironworks + March of the Machines + Master of Etherium + Slagstone Refinery + Sword of the Meek
Legality
Constructed
- Standard Not legal
- Pioneer Legal
- Modern Legal
- Legacy Legal
- Vintage Legal
- Pauper Not legal
- Future Standard Not legal
- Historic Legal
- Timeless Legal
- Alchemy Not legal
- Penny Dreadful Not legal
- Premodern Not legal
- Old School 93/94 Not legal
Singleton
- Gladiator Legal
Commander formats
- Commander Legal
- Duel Commander Legal
- Pauper Commander Not legal
- PreDH Not legal
- Tiny Leaders Not legal
- Oathbreaker Legal
- Brawl Legal
- Standard Brawl Not legal
- Competitive Brawl Legal