Rakdos, Lord of Riots + Myr Retriever + Junk Diver + Ashnod's Altar

Rakdos, Lord of Riots

Myr Retriever

Junk Diver

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing Junk Diver, adding CC.
2. Junk Diver dies, returning Myr Retriever from your graveyard to your hand.
3. Cast Myr Retriever by paying at most 1.
4. Activate Ashnod's Altar by sacrificing Myr Retriever, adding CC.
5. Myr Retriever dies, returning Junk Diver from your graveyard to your hand.
6. Cast Junk Diver by paying at most 2.
7. Repeat.