the front side of Haakon, Stromgald Scourge
the back of a classic MtG card
the front side of Soldevi Adnate
the back of a classic MtG card
the front side of Intruder Alarm
the back of a classic MtG card

Color Identity: U, B

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Soldevi Adnate does not have summoning sickness.
  2. You control another nontoken Knight that can be cast using only black mana.

Steps

  1. Activate Soldevi Adnate by tapping it and sacrificing any other nontoken Knight that can be cast using only black mana, adding an amount of ({B} magic symbol)   equal to that creature's mana value.
  2. Cast the Knight from your graveyard by paying its mana cost.
  3. The Knight enters the battlefield, triggering Intruder Alarm, untapping all creatures.
  4. Repeat.

Results

  1. Infinite death triggers.
  2. Infinite ETB.
  3. Infinite LTB.
  4. Infinite mana creatures you control can produce.
  5. Infinite sacrifice triggers.
  6. Infinite untap of all creatures.

Metadata

  1. In 1 deck according to EDHREC.
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