Six + Scrap Trawler + Chromatic Sphere + Glaring Fleshraker

Six

Scrap Trawler

Chromatic Sphere

Glaring Fleshraker

How it works

1. Cast Chromatic Sphere from your graveyard by paying 1 and discarding an artifact land card from your hand.
2. Glaring Fleshraker's first ability triggers, creating a 0/1 Eldrazi Spawn creature token.
3. When the Eldrazi Spawn enters, Glaring Fleshraker's second ability triggers, dealing 1 damage to each opponent.
4. Activate the Eldrazi Spawn by sacrificing it, adding C.
5. Activate Chromatic Sphere by paying 1, tapping and sacrificing it, adding 1 and causing you to draw a card.
6. Scrap Trawler triggers, returning an artifact land card from your graveyard to your hand.
7. Repeat.

This loop turns your graveyard into an engine of relentless recursive damage, fueled by Six granting your nonland permanents retrace to cast Chromatic Sphere repeatedly from the graveyard by discarding an artifact land. As the Sphere is cast, Glaring Fleshraker spots the colorless spell to spawn an Eldrazi Spawn token, which immediately triggers the Fleshraker's second ability to ping your opponents to death. Finally, sacrificing the Chromatic Sphere triggers Scrap Trawler, whose ability retrieves your discarded artifact land right back to your hand so you can feed the retrace cost all over again.