Queen Allenal of Ruadach + Void Attendant + Rest in Peace + Phyrexian Altar

Queen Allenal of Ruadach

Void Attendant

Rest in Peace

Phyrexian Altar

How it works

1. Activate Void Attendant by paying 1 and putting a card an opponent owns from exile into their graveyard.
2. The card is instead put back into exile due to Rest in Peace.
3. Resolve the Void Attendant ability, creating a 1/1 Soldier and a 1/1 Eldrazi Scion creature token.
4. Activate Phyrexian Altar twice by sacrificing the Eldrazi Scion and Soldier, adding 1.
5. Repeat.

This clever loop relies on Rest in Peace to turn Void Attendant's exile-targeting ability into a perpetual recycling engine; because Rest in Peace exiles cards instead of letting them hit the graveyard, you can endlessly pull the exact same card from exile to fuel Void Attendant's activation cost. Every time you activate the Eldrazi, Queen Allenal of Ruadach's replacement effect steps in to sweeten the deal, turning a single generated token into both an Eldrazi Scion and a 1/1 white Soldier. Finally, Phyrexian Altar neatly converts those sacrificed tokens right back into the green and generic mana needed to keep the cycle spinning infinitely.