Color Identity: W, U

Prerequisites

  1.  All permanents on the battlefield.

Steps

  1. Activate
    Opposition
    Opposition
    by tapping
    Stonybrook Schoolmaster
    Stonybrook Schoolmaster
    , targeting
    Stonybrook Schoolmaster
    Stonybrook Schoolmaster
    .
  2. Stonybrook Schoolmaster
    Stonybrook Schoolmaster
    triggers, creating a 1/1 Merfolk Wizard creature token.
  3. The Merfolk Wizard enters the battlefield, triggering
    Intruder Alarm
    Intruder Alarm
    , untapping all creatures.
  4. Resolve the
    Opposition
    Opposition
    ability, tapping
    Stonybrook Schoolmaster
    Stonybrook Schoolmaster
    .
  5. Stonybrook Schoolmaster
    Stonybrook Schoolmaster
    triggers, creating a 1/1 Merfolk Wizard creature token.
  6. The Merfolk Wizard enters the battlefield, triggering
    Intruder Alarm
    Intruder Alarm
    , untapping all creatures.
  7. Repeat.

Results

  1. Infinite creature tokens.
  2. Infinite ETB.
  3. Infinite mana creatures you control can produce.
  4. Infinite untap of all creatures.

Metadata

  1. In 349 decks according to EDHREC.
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