Mikaeus, the Unhallowed + River Kelpie + Yahenni, Undying Partisan

UB identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Yahenni by sacrificing River Kelpie.
  2. When River Kelpie dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. When River Kelpie enters, its first ability triggers, causing you to draw a card.
  4. Resolve the Yahenni ability.
  5. Activate Yahenni by sacrificing River Kelpie.
  6. When River Kelpie dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  7. When River Kelpie enters, its first ability triggers, causing you to draw a card.
  8. Resolve the Yahenni ability.
  9. Repeat.

What the combo produces