Golgari Thug + Bolas's Citadel + Yahenni, Undying Partisan + Vein Ripper

Golgari Thug

Bolas's Citadel

Yahenni, Undying Partisan

Vein Ripper

How it works

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

This clever loop lets you turn life into an engine of endless attrition by repeatedly sending a single creature on a fatal trip. With Bolas's Citadel providing the magical infrastructure to cast spells straight from the top of your library for life instead of mana, you can continuously cast Golgari Thug for just two life. Yahenni, Undying Partisan gives you a reliable outlet to sacrifice the Thug at will, which simultaneously triggers Golgari Thug's own death ability to stack itself neatly back on top of your library. Meanwhile, Vein Ripper watches the carnage unfold, draining your opponents and padding your life total with every single sacrifice so you can comfortably keep paying the Citadel's life cost until the table falls.