Grenzo, Dungeon Warden + Transplant Theorist + Sengir Autocrat + Ashnod's Altar

Grenzo, Dungeon Warden

Transplant Theorist

Sengir Autocrat

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing Sengir Autocrat, adding CC.
2. When Sengir Autocrat leaves the battlefield, its second ability triggers, exiling all Serf tokens.
3. Activate Transplant Theorist by paying 2, putting Sengir Autocrat on the bottom of your library from your graveyard.
4. Activate Grenzo by paying 2, putting Sengir Autocrat into your graveyard from the bottom of your library, and then putting it onto the battlefield.
5. When Sengir Autocrat enters the battlefield, its first ability triggers, creating three 0/1 Serf creature tokens.
6. Activate Ashnod's Altar three times by sacrificing the Serfs, adding six C.
7. Repeat.