Color Identity: G, U

Prerequisites

  1.  
    Bioshift
    Bioshift
    in exile (
    Bioshift
    Bioshift
    exiled by
    Isochron Scepter
    Isochron Scepter
    ).
  2.  All other permanents on the battlefield.
  3. ({2} magic symbol)   each turn available.

Steps

  1. At the beginning of your upkeep,
    Tamiyo's Journal
    Tamiyo's Journal
    triggers, creating a Clue artifact token.
  2. At the beginning of your combat phase,
    Workshop Elders
    Workshop Elders
    triggers, causing the Clue to become a 0/0 artifact creature token and putting four +1/+1 counters on it.
  3. Activate
    Isochron Scepter
    Isochron Scepter
    by paying ({2} magic symbol)   and tapping it, casting a copy of
    Bioshift
    Bioshift
    without paying its mana cost, targeting the Clue that has +1/+1 counters on it and
    Sage of Hours
    Sage of Hours
    .
  4. Sage of Hours
    Sage of Hours
    triggers, putting a +1/+1 counter on itself.
  5. Resolve
    Bioshift
    Bioshift
    , moving the four +1/+1 counters from the Clue onto
    Sage of Hours
    Sage of Hours
    .
  6. The Clue dies as a state-based action due to having 0 toughness.
  7. Activate
    Sage of Hours
    Sage of Hours
    by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
  8. Repeat each turn.

Results

  1. Infinite turns.

Metadata

  1. In 0 decks according to EDHREC.
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