the front side of Time Sieve
the back of a classic MtG card
the front side of Myr Battlesphere
the back of a classic MtG card
the front side of Mechanized Production
the back of a classic MtG card

Color Identity: U, B

Initial Card State

  1.  All permanents on the battlefield.

Notable Prerequisites

  1. Mechanized Production attached to Myr Battlesphere.

Steps

  1. At the beginning of your upkeep, Mechanized Production triggers, creating a token copy of Myr Battlesphere.
  2. The Myr Battlesphere token enters the battlefield, creating four 1/1 Myr creature tokens.
  3. Activate Time Sieve by tapping it, sacrificing the Myr Battlesphere token and sacrificing the four Myr tokens, causing you to take an extra turn after this one.
  4. Repeat each turn.

Results

  1. Infinite turns.

Metadata

  1. In 2489 decks according to EDHREC.
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