Ambitious Aetherborn + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Yahenni, Undying Partisan

WB identity

Commander legal

The 3 combo pieces

• Ambitious Aetherborn
• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Yahenni, Undying Partisan

How to execute it

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

What the combo produces

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