the front side of Maester Seymour
the back of a classic MtG card
the front side of Crystalline Crawler
the back of a classic MtG card
the front side of Najeela, the Blade-Blossom
the back of a classic MtG card

Color Identity: W, U, B, R, G

Initial Card State

  1.  All permanents on the battlefield (Maester Seymour with power 5 or greater).

Steps

  1. At the beginning of your combat phase, Maester Seymour triggers, putting at least five +1/+1 counters on Crystalline Crawler.
  2. Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding one white manaone blue manaone black manaone red manaone green mana.
  3. Activate Najeela by paying one white manaone blue manaone black manaone red manaone green mana, untapping all attacking creatures you control and causing you to get an additional combat phase after this one.
  4. Repeat.

Results

  1. Infinite creature tokens with haste.
  2. Infinite colored mana.
  3. Infinite combat phases.
  4. Infinite +1/+1 counters on creatures you control.
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