the front side of Matter Reshaper
the back of a classic MtG card
the front side of Phyrexian Altar
the back of a classic MtG card
the front side of Haunted Crossroads
the back of a classic MtG card

Color Identity: B

Initial Card State

  1.  All permanents on the battlefield.

Steps

  1. Sacrifice Matter Reshaper to Phyrexian Altar, adding one black mana.
  2. With Matter Reshaper's trigger on the stack, activate Haunted Crossroads by paying one black mana, putting Matter Reshaper from your graveyard on top of your library.
  3. Resolve Matter Reshaper's trigger, revealing Matter Reshaper on top of your library, and putting it on the battlefield.
  4. Repeat.

Results

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