Deathrender + Myr Retriever + Workshop Assistant + Blasting Station

Deathrender

Myr Retriever

Workshop Assistant

Blasting Station

How it works

1. Activate Blasting Station by tapping it and sacrificing Myr Retriever.
2. Myr Retriever dies, triggering itself and Deathrender.
3. Resolve the Myr Retriever trigger, returning Workshop Assistant from your graveyard to your hand.
4. Resolve the Deathrender trigger, putting Workshop Assistant from your hand onto the battlefield, and attaching Deathrender to it.
5. Workshop Assistant enters the battlefield, triggering Blasting Station, untapping Blasting Station.
6. Resolve the Blasting Station ability from step 1, dealing 1 damage to any target.
7. Activate Blasting Station by tapping it and sacrificing Workshop Assistant.
8. Workshop Assistant dies, triggering itself and Deathrender.
9. Resolve the Workshop Assistant trigger, returning Myr Retriever from your graveyard to your hand.
10. Resolve the Deathrender trigger, putting Myr Retriever from your hand onto the battlefield, and attaching Deathrender to it.
11. Myr Retriever enters the battlefield, triggering Blasting Station, untapping Blasting Station.
12. Resolve the Blasting Station ability from step 7, dealing 1 damage to any target.
13. Repeat.