the front side of Gyre Engineer
the back of a classic MtG card
the front side of Umbral Mantle
the back of a classic MtG card
the front side of Training Grounds
the back of a classic MtG card

Color Identity: G, U

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Umbral Mantle attached to Gyre Engineer.
  2. Gyre Engineer does not have summoning sickness.

Steps

  1. Activate Gyre Engineer by tapping it, adding ({G} magic symbol)  ({U} magic symbol)  .
  2. Activate Gyre Engineer by paying ({1} magic symbol)   and untapping it, giving itself +2/+2 until end of turn.
  3. Repeat.

Results

  1. Infinitely large Gyre Engineer until end of turn.
  2. Infinite green mana.
  3. Infinite blue mana.
  4. Infinite untap of creatures you control.
  5. Infinite mana creatures you control can produce.
  6. Infinitely large creature until end of turn.

Metadata

  1. In 113 decks according to EDHREC.
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