Bygone Bishop + Myr Retriever + Junk Diver + Krark-Clan Ironworks

Bygone Bishop

Myr Retriever

Junk Diver

Krark-Clan Ironworks

How it works

1. Activate Krark-Clan Ironworks by sacrificing Junk Diver, adding CC.
2. When Junk Diver dies, it triggers, returning Myr Retriever from your graveyard to your hand.
3. Cast Myr Retriever by paying 2.
4. Bygone Bishop triggers, creating a Clue artifact token.
5. Activate Krark-Clan Ironworks twice by sacrificing the Clue and Myr Retriever, adding CCCC.
6. When Myr Retriever dies, it triggers, returning Junk Diver from your graveyard to your hand.
7. Cast Junk Diver by paying 3.
8. Bygone Bishop triggers, creating a Clue artifact token.
9. Repeat.

This clever loop uses Krark-Clan Ironworks as an engine that breaks down our mechanical parts for raw colorless mana, which then funds the casting of our recursive threats. As Junk Diver and Myr Retriever trade places from the graveyard back to our hand upon death, they continuously feed the Ironworks while Bygone Bishop watches the cheap creature spells arrive to mint a steady stream of Clue tokens. Ultimately, those generated Clues and extra artifacts can be sacrificed right back into the Ironworks for a massive surplus of mana, or cracked later for infinite card draw.