Wretched Throng + Ashnod's Altar + Pitiless Plunderer + Stone Calendar + Barkform Harvester

Wretched Throng

Ashnod's Altar

Pitiless Plunderer

Stone Calendar

Barkform Harvester

How it works

1. Activate Ashnod's Altar by sacrificing Wretched Throng, adding CC.
2. When Wretched Throng dies, it and Pitiless Plunderer trigger.
3. Holding priority, activate Barkform Harvester by paying 2, putting Wretched Throng from your graveyard onto the bottom of your library.
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
5. Resolve the Wretched Throng trigger, putting Wretched Throng from your library into your hand.
6. Activate the Treasure by tapping and sacrificing it, adding .
7. Cast Wretched Throng by paying due to Stone Calendar.
8. Repeat.