the front side of Rancor
the back of a classic MtG card
the front side of Phyrexian Altar
the back of a classic MtG card
the front side of Warehouse Tabby
the back of a classic MtG card

Color Identity: B, G

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Rancor attached to another creature you control.

Steps

  1. Activate Phyrexian Altar by sacrificing the creature with Rancor attached, adding one green mana.
  2. When Rancor leaves the battlefield, it and Warehouse Tabby trigger.
  3. Resolve the Warehouse Tabby trigger, creating a 1/1 Rat creature token.
  4. Resolve the Rancor trigger, returning it to your hand from your graveyard.
  5. Cast Rancor by paying one green mana, attaching it to the Rat token.
  6. Repeat.

Results

  1. Infinite death triggers.
  2. Infinite creature ETB.
  3. Infinite creature LTB.
  4. Infinite creature sacrifice triggers.
  5. Infinite storm count.
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