Golgari Thug + Blasting Station + Dross Harvester + Bolas's Citadel

Golgari Thug

Blasting Station

Dross Harvester

Bolas's Citadel

How it works

1. Activate Blasting Station by tapping it and 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 Blasting Station ability.
6. Cast Golgari Thug from the top of your library by paying 2 life.
7. When Golgari Thug enters, Blasting Station triggers, untapping Blasting Station
8. Repeat.

This loop turns Golgari Thug into an endlessly recycles ammunition for Blasting Station, letting you sacrifice the creature to deal damage over and over again. As Golgari Thug hits the graveyard, its own trigger tucks it neatly back onto the top of your library while Dross Harvester offsets the life costs with a steady stream of lifegain. With Bolas's Citadel sitting in play, you can simply bypass mana altogether, casting the creature straight off the top of your library using life as currency while Blasting Station's untap ability resets the station for the next iteration.