Color Identity: W, U, B

Prerequisites

  1.  All permanents on the battlefield.

Steps

  1. At the beginning of your end step,
    Soulherder
    Soulherder
    's second ability triggers, blinking
    Myr Battlesphere
    Myr Battlesphere
    .
  2. Myr Battlesphere
    Myr Battlesphere
    's first ability triggers twice and
    Soulherder
    Soulherder
    's first ability triggers.
  3. Resolve the
    Soulherder
    Soulherder
    trigger, putting a +1/+1 counter on it.
  4. Resolve both
    Myr Battlesphere
    Myr Battlesphere
    triggers, creating eight 1/1 Myr artifact creature tokens.
  5. Activate
    Time Sieve
    Time Sieve
    by tapping it and sacrificing five Myrs, causing you to take an extra turn after this one.
  6. Repeat each turn.

Results

  1. Infinite turns.

Metadata

  1. In 80 decks according to EDHREC.
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