Flitterwing Nuisance + Mikaeus, the Unhallowed + Yahenni, Undying Partisan

UB identity

Commander legal

The 3 combo pieces

• Flitterwing Nuisance
• Mikaeus, the Unhallowed
• Yahenni, Undying Partisan

How to execute it

1. Activate Yahenni by sacrificing Flitterwing Nuisance.
2. When Flitterwing Nuisance dies, its undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to its replacement effect.
3. Resolve the Yahenni ability
4. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers