Wretched Throng + Rooftop Storm + Ashnod's Altar + Transplant Theorist

Wretched Throng

Rooftop Storm

Ashnod's Altar

Transplant Theorist

How it works

1. Activate Ashnod's Altar by sacrificing Wretched Throng, adding CC.
2. When Wretched Throng dies, it triggers.
3. Holding priority, activate Transplant Theorist by paying 2, putting Wretched Throng from your graveyard onto the bottom of your library.
4. Resolve the Wretched Throng trigger, putting Wretched Throng from your library into your hand.
5. Cast Wretched Throng by paying 0.
6. Repeat.