Wretched Throng + Rooftop Storm + Ashnod's Altar + Sundering Archaic

Wretched Throng

Rooftop Storm

Ashnod's Altar

Sundering Archaic

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 [[Permanent with "Pay Mana: Put target card from your graveyard on the bottom of your library"]] 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.