the front side of Cauldron of Souls
the back of a classic MtG card
the front side of Corridor Monitor
the back of a classic MtG card
the front side of Cathars' Crusade
the back of a classic MtG card
the front side of Altar of Dementia
the back of a classic MtG card

Color Identity: W, U

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Corridor Monitor does not have a -1/-1 counter on it.

Steps

  1. Activate Cauldron of Souls by tapping it, giving Corridor Monitor persist until end of turn.
  2. Activate Altar of Dementia by sacrificing Corridor Monitor.
  3. When Corridor Monitor dies, its persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  4. When Corridor Monitor enters the battlefield, it and Cathars' Crusade trigger.
  5. Resolve the Corridor Monitor trigger, untapping Cauldron of Souls.
  6. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control.
  7. Resolve the Altar of Dementia ability from step 2, causing target player to mill cards equal to Corridor Monitor's power.
  8. Repeat.

Results

  1. Infinite death triggers.
  2. Infinite ETB.
  3. Infinite LTB.
  4. Infinite mill.
  5. Infinite sacrifice triggers.
  6. Infinite self-mill.
  7. Infinite +1/+1 counters.

Metadata

  1. In 2 decks according to EDHREC.
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