Krark-Clan Ironworks + Master Transmuter Combos

3 known combos featuring both cards in Commander

Infinite turns Lock

Combo 1 with Athreos, Shroud-Veiled + Ugin's Nexus + Xenic Poltergeist

Results: Infinite turns · Lock
Steps
  1. Activate Xenic Poltergeist by tapping it, causing Ugin's Nexus to become an artifact creature until end of turn.
  2. At the beginning of your end step, Athreos' second ability triggers, putting a coin counter on Ugin's Nexus.
  3. Activate Krark-Clan Ironworks by sacrificing Ugin's Nexus, adding {C}{C}.
  4. Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
  5. Athreos' third ability triggers, causing you to return Ugin's Nexus from exile to the battlefield.
  6. Activate Master Transmuter by paying {U}, tapping it and returning Ugin's Nexus to your hand, choosing to not put an artifact onto the battlefield.
  7. Move to your extra turn.
  8. Cast Ugin's Nexus by paying {5}.
  9. Repeat.

Combo 2 with Athreos, Shroud-Veiled + Ugin's Nexus + Karn, Silver Golem

Also requires: Athreos, Shroud-Veiled Athreos, Shroud-Veiled Ugin's Nexus Ugin's Nexus Karn, Silver Golem Karn, Silver Golem
Results: Infinite turns · Lock
Show steps
  1. Activate Karn by paying {1}, causing Ugin's Nexus to become an artifact creature until end of turn.
  2. At the beginning of your end step, Athreos' second ability triggers, putting a coin counter on Ugin's Nexus.
  3. Activate Krark-Clan Ironworks by sacrificing Ugin's Nexus, adding {C}{C}.
  4. Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
  5. Athreos' third ability triggers, causing you to return Ugin's Nexus from exile to the battlefield.
  6. Activate Master Transmuter by paying {U}, tapping it and returning Ugin's Nexus to your hand, choosing to not put an artifact onto the battlefield.
  7. Move to your extra turn.
  8. Cast Ugin's Nexus by paying {5}.
  9. Repeat.

Combo 3 with Athreos, Shroud-Veiled + Ugin's Nexus + Karn, the Great Creator

Results: Infinite turns · Lock
Show steps
  1. Activate Karn's first loyalty ability by putting a loyalty counter on it, causing Ugin's Nexus to become an artifact creature until end of turn.
  2. At the beginning of your end step, Athreos' second ability triggers, putting a coin counter on Ugin's Nexus.
  3. Activate Krark-Clan Ironworks by sacrificing Ugin's Nexus, adding {C}{C}.
  4. Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
  5. Athreos' third ability triggers, causing you to return Ugin's Nexus from exile to the battlefield.
  6. Activate Master Transmuter by paying {U}, tapping it and returning Ugin's Nexus to your hand, choosing to not put an artifact onto the battlefield.
  7. Move to your extra turn.
  8. Cast Ugin's Nexus by paying {5}.
  9. Repeat.
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