Chaos Spewer + Mikaeus, the Unhallowed + Yahenni, Undying Partisan

BR identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Yahenni by sacrificing Chaos Spewer.
  2. When Chaos Spewer dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. When Chaos Spewer enters the battlefield, it triggers, putting a -1/-1 counter on it.
  4. Resolve the Yahenni ability
  5. Repeat.

What the combo produces