the front side of Hellkite Charger
the back of a classic MtG card
the front side of Shriekwood Devourer
the back of a classic MtG card

Color Identity: R, G

Initial Card State

  1.  Hellkite Charger and Shriekwood Devourer on the battlefield.

Notable Prerequisites

  1. You control up to seven lands that can tap to produce at least five generic manaone red manaone red mana.
  2. You control a creature with power 7 or greater that does not have summoning sickness, and that cannot be blocked and killed by an opponent.

Steps

  1. Declare any creature with power 7 or greater that cannot be blocked and killed by an opponent and Hellkite Charger if it isn't the aforementioned creature as attackers.
  2. Shriekwood Devourer and Hellkite Charger trigger.
  3. Resolve the Shriekwood Devourer trigger, untapping at least seven lands.
  4. Holding priority, activate up to seven lands by tapping them, adding at least five generic manaone red manaone red mana.
  5. Resolve the Hellkite Charger trigger, causing you to pay five generic manaone red manaone red mana to untap all attacking creatures you control and causing you to get an additional combat phase after this one.
  6. Repeat.

Results

  1. Infinite creature ETB.
  2. Infinite combat phases.
  3. Infinite mana lands you control can produce.
  4. Infinite untap of lands you control.
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