the front side of Pentavus
the back of a classic MtG card
the front side of Cathars' Crusade
the back of a classic MtG card
the front side of Krark-Clan Ironworks
the back of a classic MtG card

Color Identity: W

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Pentavus has at least two +1/+1 counters on it.

Mana Needed

  1. one generic mana available.

Steps

  1. Activate Pentavus' first ability by paying one generic mana and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
  2. The Pentavite enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
  3. Activate Krark-Clan Ironworks by sacrificing the Pentavite, adding one colorless manaone colorless mana.
  4. Repeat.

Results

  1. Infinite colorless mana.
  2. Infinite creature tokens.
  3. Infinite death triggers.
  4. Infinite creature ETB.
  5. Infinite creature LTB.
  6. Infinite creature sacrifice triggers.
  7. Infinite +1/+1 counters on creatures you control.
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