the front side of Emrakul, the Exigent Doom
the back of a classic MtG card
the front side of Sanctum of Eternity
the back of a classic MtG card

Color Identity: C

Initial Card State

  1.  Sanctum of Eternity on the battlefield.
  2.   Emrakul in hand or in the command zone.
  3.  Emrakul must be your commander.

Notable Prerequisites

  1. Lands you control excluding Sanctum of Eternity can tap to produce twelve generic mana or more.
  2. If you're casting Emrakul from the command zone, you must provide enough additional mana to pay for its commander tax if applicable.

Steps

  1. Activate any number of lands by tapping them, adding at least twelve generic mana.
  2. Cast Emrakul by paying ten generic mana plus commander tax if applicable.
  3. Emrakul triggers, untapping all lands you control.
  4. Resolve Emrakul. Then, activate Sanctum of Eternity's second ability by paying two generic mana and tapping it, returning Emrakul from the battlefield to your hand.
  5. Repeat.

Results

  1. Infinite creature ETB.
  2. Infinite creature LTB.
  3. Infinite mana lands you control can produce.
  4. Infinite storm count.
  5. Infinite untap of lands you control.
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