Void Attendant + Rest in Peace + Phyrexian Altar + Training Grounds

Void Attendant

Rest in Peace

Phyrexian Altar

Training Grounds

How it works

1. Activate Void Attendant by paying 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 Eldrazi Scion creature token.
4. Activate Phyrexian Altar by sacrificing the Eldrazi Scion, adding .
5. Repeat.