Krark-Clan Ironworks + Mycosynth Golem + Junk Diver + Myr Retriever

Krark-Clan Ironworks

Mycosynth Golem

Junk Diver

Myr Retriever

How it works

1. Pay 0 to cast Myr Retriever.
2. Activate Krark-Clan Ironworks by sacrificing Myr Retriever to add CC.
3. Myr Retriever triggers, returning Junk Diver from your graveyard to your hand.
4. Pay 1 to cast Junk Diver.
5. Activate Krark-Clan Ironworks by sacrificing Junk Diver to add CC.
6. Junk Diver triggers, returning Myr Retriever from your graveyard to your hand.
7. Repeat.