Color Identity: U

Prerequisites

  1.  
    Shriekhorn
    Shriekhorn
    in hand.
  2.  
    Tidespout Tyrant
    Tidespout Tyrant
    and
    Mana Vault
    Mana Vault
    on the battlefield.

Steps

  1. Activate
    Mana Vault
    Mana Vault
    by tapping it, adding ({C} magic symbol)  ({C} magic symbol)  ({C} magic symbol)  .
  2. Cast
    Shriekhorn
    Shriekhorn
    by paying ({1} magic symbol)  .
  3. Tidespout Tyrant
    Tidespout Tyrant
    triggers, returning
    Mana Vault
    Mana Vault
    from the battlefield to your hand.
  4. Activate
    Shriekhorn
    Shriekhorn
    by tapping and removing a charge counter from it, causing target player to mill two cards.
  5. Cast
    Mana Vault
    Mana Vault
    by paying ({1} magic symbol)  .
  6. Tidespout Tyrant
    Tidespout Tyrant
    triggers, returning
    Shriekhorn
    Shriekhorn
    from the battlefield to your hand.
  7. Repeat.

Results

  1. Infinite colorless mana.
  2. Infinite mill.
  3. Infinite self-mill.
  4. Infinite storm count.

Metadata

  1. In 28 decks according to EDHREC.
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