Nether Traitor + Kheru Goldkeeper + Insidious Roots + Yahenni, Undying Partisan

Nether Traitor

Kheru Goldkeeper

Insidious Roots

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Nether Traitor.
2. Activate Yahenni by sacrificing another creature.
3. When the creature dies, Nether Traitor triggers, causing you to pay to return Nether Traitor from your graveyard to the battlefield.
4. Kheru Goldkeeper and Insidious Roots triggers, creating a Treasure token, a 1/1 Plant creature token and putting a +1/+1 counter on each Plant you control.
5. Resolve the Yahenni ability.
6. Activate the Treasure by tapping and sacrificing it, adding .
7. Repeat.