Slobad, Iron Goblin + Thornbite Staff + Myr Retriever + Workshop Assistant

Slobad, Iron Goblin

Thornbite Staff

Myr Retriever

Workshop Assistant

How it works

1. Activate Slobad by tapping it and sacrificing Workshop Assistant, adding that can only be spent to activate abilities of artifacts or to cast artifact spells.
2. Workshop Assistant dies, triggering itself and Slobad.
3. Resolve the Workshop Assistant trigger, returning Myr Retriever from your graveyard to your hand.
4. Resolve the Slobad trigger, untapping it.
5. Cast Myr Retriever by paying 2.
6. Activate Slobad by tapping it and sacrificing Myr Retriever, adding that can only be spent to activate abilities of artifacts or to cast artifact spells.
7. Myr Retriever dies, triggering itself and Slobad.
8. Resolve the Myr Retriever trigger, returning Workshop Assistant from your graveyard to your hand.
9. Resolve the Slobad trigger, untapping it.
10. Cast Workshop Assistant by paying 3.
11. Repeat.