Golgari Thug + Altar of Dementia + Bolas's Citadel + Vein Ripper

Golgari Thug

Altar of Dementia

Bolas's Citadel

Vein Ripper

How it works

1. Activate Altar of Dementia 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 Altar of Dementia ability.
6. Cast Golgari Thug from the top of your library by paying 2 life.
7. Repeat.

This loop transforms a modest graveyard recycling tool into an unstoppable engine of attrition, fueled by the top-deck mastery of Bolas's Citadel to repeatedly cast creatures straight from your library by paying life instead of mana. Altar of Dementia provides the sacrifice outlet that continuously bins Golgari Thug, whose dredge and death triggers ensure it immediately returns to the top of your library to be played over and over again. Meanwhile, Vein Ripper oversees this grim cycle, turning every single sacrifice into a steady stream of life drain that punishes your opponents while keeping your own life total healthy enough to sustain the Citadel's costs.