Color Identity: W, U, B

Prerequisites

  1.  
    Evil Twin
    Evil Twin
    in hand.
  2.  
    Adarkar Valkyrie
    Adarkar Valkyrie
    and
    Intruder Alarm
    Intruder Alarm
    on the battlefield.
  3. Adarkar Valkyrie
    Adarkar Valkyrie
    does not have summoning sickness.
  4. You control at least one legendary creature.
  5. ({2} magic symbol)  ({U} magic symbol)  ({B} magic symbol)   available.

Steps

  1. Activate
    Adarkar Valkyrie
    Adarkar Valkyrie
    by tapping it, targeting any legendary creature you control.
  2. Cast
    Evil Twin
    Evil Twin
    by paying ({2} magic symbol)  ({U} magic symbol)  ({B} magic symbol)  , choosing to have it enter the battlefield as a copy of the legendary creature targeted in step 1.
  3. Put the legendary creature into your graveyard due to the legend rule.
  4. Adarkar Valkyrie
    Adarkar Valkyrie
    and
    Intruder Alarm
    Intruder Alarm
    trigger.
  5. Resolve the
    Intruder Alarm
    Intruder Alarm
    trigger, untapping all creatures.
  6. Holding priority, activate
    Adarkar Valkyrie
    Adarkar Valkyrie
    by tapping it, targeting
    Evil Twin
    Evil Twin
    .
  7. Resolve the
    Adarkar Valkyrie
    Adarkar Valkyrie
    trigger from step 4, returning the legendary creature to the battlefield from your graveyard.
  8. Put
    Evil Twin
    Evil Twin
    into your graveyard due to the legend rule.
  9. Adarkar Valkyrie
    Adarkar Valkyrie
    and
    Intruder Alarm
    Intruder Alarm
    trigger.
  10. Resolve the
    Intruder Alarm
    Intruder Alarm
    trigger, untapping all creatures.
  11. Holding priority, activate
    Adarkar Valkyrie
    Adarkar Valkyrie
    by tapping it, targeting the legendary creature.
  12. Resolve the
    Adarkar Valkyrie
    Adarkar Valkyrie
    trigger from step 9, returning
    Evil Twin
    Evil Twin
    to the battlefield from your graveyard as a copy of the legendary creature.
  13. Repeat from step 3.

Results

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

Metadata

  1. In 23 decks according to EDHREC.
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