Scrap Trawler + Myr Retriever + Krark-Clan Ironworks + Sol Ring + Junk Diver

Scrap Trawler

Myr Retriever

Krark-Clan Ironworks

Sol Ring

Junk Diver

How it works

1. Activate Krark-Clan Ironworks by sacrificing Myr Retriever, adding CC.
2. Myr Retriever dies, triggering itself and Scrap Trawler.
3. Resolve the Myr Retriever trigger, returning Junk Diver from your graveyard to your hand.
4. Resolve the Scrap Trawler trigger, returning Sol Ring from your hand to your graveyard.
5. Cast Sol Ring by paying 1.
6. Activate Sol Ring by tapping it, adding CC.
7. Activate Krark-Clan Ironworks by sacrificing Sol Ring, adding CC.
8. Scrap Trawler triggers, choose not to return an artifact to your hand.
9. Cast Junk Diver by paying 3.
10. Activate Krark-Clan Ironworks by sacrificing Junk Diver, adding CC.
11. Junk Diver dies, triggering itself and Scrap Trawler.
12. Resolve the Junk Diver trigger, returning Myr Retriever from your graveyard to your hand.
13. Resolve the Scrap Trawler trigger, returning Sol Ring from your graveyard to your hand.
14. Repeat steps 5-8 one additional time.
15. Cast Myr Retriever by paying 2.
16. Repeat from step 1.