the front side of Aetheric Amplifier
the back of a classic MtG card
the front side of Magistrate's Scepter
the back of a classic MtG card

Color Identity: C

Initial Card State

  1.  
    Aetheric Amplifier
    Aetheric Amplifier
    and
    Magistrate's Scepter
    Magistrate's Scepter
    on the battlefield (
    Magistrate's Scepter
    Magistrate's Scepter
    with three or more charge counters on it).

Mana Needed

  1. ({4} magic symbol)   each turn available.

Steps

  1. Activate
    Aetheric Amplifier
    Aetheric Amplifier
    by paying ({4} magic symbol)   and tapping it, doubling the charge counters on
    Magistrate's Scepter
    Magistrate's Scepter
    .
  2. Activate
    Magistrate's Scepter
    Magistrate's Scepter
    's second ability by tapping it and removing three charge counters from it, causing you to take an extra turn after this one.
  3. Repeat each turn.

Results

  1. Infinite turns.
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