March of the Machines + Unctus, Grand Metatect Combos

3 known combos featuring both cards in Commander

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

Combo 1 with Basalt Monolith

Also requires: Basalt Monolith Basalt Monolith
Results: Infinite draw triggers · Infinite looting · Infinite self-discard triggers
Steps
  1. Activate Unctus by paying {U/P}, causing Basalt Monolith to become a blue artifact in addition to its other types until end of turn.
  2. Activate Basalt Monolith's first ability by tapping it, adding {C}{C}{C}.
  3. Basalt Monolith triggers, causing you to loot.
  4. Activate Basalt Monolith's second ability by paying {C}{C}{C}, untapping it.
  5. Repeat from step 2.

Combo 2 with Slagstone Refinery + Sword of the Meek + Ashnod's Altar

Also requires: Slagstone Refinery Slagstone Refinery Sword of the Meek Sword of the Meek Ashnod's Altar Ashnod's Altar
Results: Infinite colorless mana · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers · Infinite tapped creature tokens · Infinite tapped Powerstone tokens
Show steps
  1. Activate Ashnod's Altar by sacrificing Sword of the Meek, adding {C}{C}.
  2. Sword of the Meek dies, triggering Slagstone Refinery, creating a tapped Powerstone token that enters the battlefield as a 1/1 creature due to March of the Machines and Unctus.
  3. Sword of the Meek triggers, returning itself from your graveyard to the battlefield, but not attaching itself to the Powerstone due to Sword of the Meek becoming a creature.
  4. Repeat.

Combo 3 with Slagstone Refinery + Sword of the Meek + Krark-Clan Ironworks

Also requires: Slagstone Refinery Slagstone Refinery Sword of the Meek Sword of the Meek Krark-Clan Ironworks Krark-Clan Ironworks
Results: Infinite colorless mana · Infinite death triggers · Infinite ETB · Infinite LTB · Infinite sacrifice triggers · Infinite tapped creature tokens · Infinite tapped Powerstone tokens
Show steps
  1. Activate Krark-Clan Ironworks by sacrificing Sword of the Meek, adding {C}{C}.
  2. Sword of the Meek dies, triggering Slagstone Refinery, creating a tapped Powerstone token that enters the battlefield as a 1/1 creature due to March of the Machines and Unctus.
  3. Sword of the Meek triggers, returning itself from your graveyard to the battlefield, but not attaching itself to the Powerstone due to Sword of the Meek becoming a creature.
  4. Repeat.
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