Tawnos, Solemn Survivor + Deceiver Exarch + Krark-Clan Ironworks

Tawnos, Solemn Survivor

Deceiver Exarch

Krark-Clan Ironworks

How it works

1. Activate Tawnos's second ability by paying 1, tapping it and sacrificing two artifact tokens, exiling Deceiver Exarch from your graveyard and creating a token copy of it that is an artifact in addition to its other types.
2. When the Deceiver Exarch token enters, it triggers, untapping Tawnos.
3. Activate Tawnos's first ability by paying 2 and tapping it, creating a copy of the Deceiver Exarch token and causing you to mill two cards.
4. When the Deceiver Exarch token enters, it triggers, untapping Tawnos.
5. Activate Krark-Clan Ironworks by sacrificing a Deceiver Exarch token, adding CC.
6. Repeat from step 3.

This loop turns your graveyard into an infinite engine by leveraging Tawnos, Solemn Survivor's ability to reanimate a creature as an artifact copy. Once Deceiver Exarch is exiled and brought back as a token, its entering-the-battlefield trigger untaps Tawnos to keep the chain going. From there, Tawnos, Solemn Survivor's first ability can endlessly copy that artifact token while Krark-Clan Ironworks provides the necessary sacrifice outlet and mana generation to fuel the process.