The Sibsig Ceremony + Scrap Trawler + Junk Diver + Temur Battlecrier

The Sibsig Ceremony

Scrap Trawler

Junk Diver

Temur Battlecrier

How it works

1. Cast Junk Diver by paying 0.
2. When Junk Diver enters the battlefield, The Sibsig Ceremony triggers, destroying Junk Diver and creating a 2/2 Zombie Druid creature token.
3. When Junk Diver dies, it triggers, returning Scrap Trawler from your graveyard to your hand.
4. Cast Scrap Trawler by paying 0.
5. When Scrap Trawler enters the battlefield, The Sibsig Ceremony triggers, destroying Scrap Trawler and creating a 2/2 Zombie Druid creature token.
6. When Scrap Trawler dies, it triggers, returning Junk Diver from your graveyard to your hand.
7. Repeat.
8. Cast the artifact creature in your hand by paying 0.
9. When the artifact creature enters, The Sibsig Ceremony triggers, destroying the creature and creating a 2/2 Zombie Druid creature token.
10. When the creature dies, Scrap Trawler triggers, returning Junk Diver from your graveyard to your hand.
11. Cast Junk Diver by paying 0.
12. When Junk Diver enters, The Sibsig Ceremony triggers, destroying Junk Diver and creating a 2/2 Zombie Druid creature token.
13. When Junk Diver dies, it and Scrap Trawler trigger.
14. Resolve the Junk Diver trigger, returning the artifact creature cast in step 1 from your graveyard to your hand.
15. Reoslve the Scrap Trawler trigger, returning nothing.
16. Repeat.