Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Rampant Rejuvenator + Umbral Collar Zealot

WBG identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Rampant Rejuvenator
• Umbral Collar Zealot

How to execute it

1. Activate Umbral Collar Zealot by sacrificing Rampant Rejuvenator.
2. When Rampant Rejuvenator dies, it's innate ability and persist ability each trigger.
3. Resolve the trigger from Rampant Rejuvenator's innate ability, allowing you to search your library for a number of basic land cards and put them onto the battlefield.
4. Resolve the persist trigger, returning Rampant Rejuvenator from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
5. Resolve the Umbral Collar Zealot ability.
6. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers
• Infinite surveil
• Near-infinite landfall triggers
• Put all basic lands from your library onto the battlefield