the front side of Reassembling Skeleton
the back of a classic MtG card
the front side of Phyrexian Altar
the back of a classic MtG card
the front side of Pawn of Ulamog
the back of a classic MtG card

Color Identity: B

Initial Card State

  1.  All permanents on the battlefield.

Steps

  1. Activate Phyrexian Altar by sacrificing Reassembling Skeleton, adding one black mana.
  2. Pawn of Ulamog triggers, creating a 0/1 Eldrazi Spawn creature token with "Sacrifice this creature: add one colorless mana".
  3. Activate the Eldrazi Spawn by sacrificing it, adding one colorless mana.
  4. Activate Reassembling Skeleton by paying one generic manaone black mana, returning it from your graveyard to the battlefield tapped.
  5. Repeat.

Results

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