Color Identity: U, R

Prerequisites

  1.  
    Riptide Laboratory
    Riptide Laboratory     on the battlefield.
  2.  
    Dualcaster Mage
    Dualcaster Mage     and
    Turnabout
    Turnabout     in hand.
  3. Other lands that can produce ({2} magic symbol)  ({U} magic symbol)  ({R} magic symbol)  ({R} magic symbol)   on the battlefield.
  4. ({4} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  ({R} magic symbol)  ({R} magic symbol)   available.

Steps

  1. Cast
    Turnabout
    Turnabout     by paying ({2} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  , targeting any land you control.
  2. Holding priority, cast
    Dualcaster Mage
    Dualcaster Mage     by paying ({1} magic symbol)  ({R} magic symbol)  ({R} magic symbol)  .
  3. Dualcaster Mage
    Dualcaster Mage     enters the battlefield, copying
    Turnabout
    Turnabout    .
  4. Holding priority, activate
    Riptide Laboratory
    Riptide Laboratory     by paying ({1} magic symbol)  ({U} magic symbol)   and tapping it, returning
    Dualcaster Mage
    Dualcaster Mage     to your hand.
  5. Resolve the
    Turnabout
    Turnabout     copy, untapping all lands you control.
  6. Repeat from step 2.

Results

  1. Infinite colored mana.
  2. Infinite ETB.
  3. Infinite LTB.
  4. Infinite storm count.

Metadata

  1. In 243 decks according to EDHREC.
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