Color Identity: U, B, R

Prerequisites

  1.  
    Cormela, Glamour Thief
    Cormela
    on the battlefield.
  2.  
    Saw in Half
    Saw in Half
    and
    Time Warp
    Time Warp
    in hand.
  3. ({5} magic symbol)  ({U} magic symbol)   each turn available.

Steps

  1. Activate
    Cormela, Glamour Thief
    Cormela
    by paying ({1} magic symbol)   and tapping it, adding ({U} magic symbol)  ({B} magic symbol)  ({R} magic symbol)   that can only be spent to cast instant or sorcery spells.
  2. Cast
    Time Warp
    Time Warp
    by paying ({3} magic symbol)  ({U} magic symbol)  ({U} magic symbol)  , causing you to take an extra turn after this one.
  3. Cast
    Saw in Half
    Saw in Half
    by paying ({2} magic symbol)  ({B} magic symbol)  , destroying
    Cormela, Glamour Thief
    Cormela
    and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
  4. Put one
    Cormela, Glamour Thief
    Cormela
    token into your graveyard due to the legend rule.
  5. When the original
    Cormela, Glamour Thief
    Cormela
    and the token
    Cormela, Glamour Thief
    Cormela
    die, their abilities trigger, returning
    Time Warp
    Time Warp
    and
    Saw in Half
    Saw in Half
    from your graveyard to your hand.
  6. Repeat each turn.

Results

  1. Infinite turns.

Metadata

  1. In 27 decks according to EDHREC.
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