the front side of The Sixth Doctor
the back of a classic MtG card
the front side of Ugin's Nexus
the back of a classic MtG card
the front side of Meticulous Excavation
the back of a classic MtG card
the front side of Krark-Clan Ironworks
the back of a classic MtG card

Color Identity: G, W, U

Initial Card State

  1.  Ugin's Nexus in hand.
  2.  All other permanents on the battlefield.

Mana Needed

  1. five generic manaone white mana each turn available.

Steps

  1. Cast Ugin's Nexus by paying five generic mana.
  2. The Sixth Doctor triggers, copying the Ugin's Nexus spell, with the copy being nonlegendary.
  3. Resolve both Ugin's Nexus spells.
  4. Activate Krark-Clan Ironworks by sacrificing the Ugin's Nexus token, adding one colorless manaone colorless mana.
  5. The Ugin's Nexus token is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
  6. Activate Meticulous Excavation by paying two generic manaone white mana, returning the nontoken Ugin's Nexus to your hand.
  7. Repeat each turn.

Results

  1. Infinite turns.
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