Pitiless Plunderer + Slagstone Refinery Combos

2 known combos featuring both cards in Commander

Infinite colorless mana Infinite death triggers Infinite ETB Infinite LTB Infinite sacrifice triggers

Combo 1 with Metalwork Colossus + Ashnod's Altar

Results: Infinite colorless mana · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers · Infinite storm count
Steps
  1. Activate Ashnod's Altar by sacrificing Metalwork Colossus, adding {C}{C}.
  2. When Metlwork Colossus dies, Slagstone Refinery and Pitiless Plunderer trigger.
  3. Resolve the Slagstone Refinery trigger, creating a tapped Powerstone artifact creature token.
  4. Resolve the Pitiless Plunderer trigger, creating a Treasure artifact token.
  5. Activate Metalwork Colossus by sacrificing the Powerstone token and the Treasure token, returning Metalwork Colossus from your graveyard to your hand.
  6. Cast Metalwork Colossus by paying at most {1}.
  7. Repeat.

Combo 2 with Metalwork Colossus + Krark-Clan Ironworks

Results: Infinite colorless mana · Infinite ETB · Infinite LTB · Infinite death triggers · Infinite sacrifice triggers · Infinite storm count
Show steps
  1. Activate Krark-Clan Ironworks by sacrificing Metalwork Colossus, adding {C}{C}.
  2. When Metlwork Colossus dies, Slagstone Refinery and Pitiless Plunderer trigger.
  3. Resolve the Slagstone Refinery trigger, creating a tapped Powerstone artifact creature token.
  4. Resolve the Pitiless Plunderer trigger, creating a Treasure artifact token.
  5. Activate Metalwork Colossus by sacrificing the Powerstone token and the Treasure token, returning Metalwork Colossus from your graveyard to your hand.
  6. Cast Metalwork Colossus by paying at most {1}.
  7. Repeat.
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