Teshar, Ancestor's Apostle + Myr Retriever + Blasting Station + Welding Jar

Teshar, Ancestor's Apostle

Myr Retriever

Blasting Station

Welding Jar

How it works

1. Activate Welding Jar by sacrificing it.
2. Activate Blasting Station by tapping it and sacrificing Myr Retriever.
3. Myr Retriever triggers, returning Welding Jar from your graveyard to your hand.
4. Resolve the Blasting Station ability, dealing 1 damage to any target.
5. Cast Welding Jar by paying 0.
6. Teshar triggers, returning Myr Retriever from your graveyard to the battlefield.
7. Blasting Station triggers, untapping itself.
8. Repeat.