Golgari Thug + Dross Harvester + Yahenni, Undying Partisan + Gwenom, Remorseless

Golgari Thug

Dross Harvester

Yahenni, Undying Partisan

Gwenom, Remorseless

How it works

1. Activate Yahenni by sacrificing Golgari Thug.
2. When Golgari Thug dies, it and Dross Harvester trigger.
3. Resolve the Golgari Thug trigger, putting it from your graveyard onto the top of your library.
4. Resolve the Dross Harvester trigger, causing you to gain 2 life.
5. Resolve the Yahenni ability.
6. Cast Golgari Thug from the top of your library by paying 2 life.
7. Repeat.

This loop centers on Yahenni, Undying Partisan acting as a reliable sacrifice outlet while steadily growing with +1/+1 counters. By sacrificing Golgari Thug to Yahenni, you trigger its post-mortem ability to place itself right back on top of your library. From there, Gwenom, Remorseless lets you bypass traditional mana costs by casting the Thug straight from the library while paying life instead—a cost neatly offset by Dross Harvester, whose static lifegain whenever a creature dies cushions your life total against both Gwenom's alternative casting costs and Dross Harvester's own end-step life loss.