Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Reputable Merchant + Yahenni, Undying Partisan

WBG identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Reputable Merchant
• Yahenni, Undying Partisan

How to execute it

1. Activate Yahenni by sacrificing Reputable Merchant.
2. When Reputable Merchant dies, its innate ability and persist ability trigger.
3. Resolve the Reputable Merchant trigger, putting a +1/+1 counter on a creature you control.
4. Resolve the persist trigger, returning Reputable Merchant from your graveyard to the battlefield with a -1/-1 counter on it.
5. When Reputable Merchant enters, it triggers, putting a +1/+1 counter on it.
6. Resolve the Yahenni ability.
7. Repeat.

What the combo produces

• Infinite +1/+1 counters on creatures you control
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers