Golgari Thug + Blasting Station + Healer of the Pride + Bolas's Citadel

Golgari Thug

Blasting Station

Healer of the Pride

Bolas's Citadel

How it works

1. Activate Blasting Station by tapping it and sacrificing Golgari Thug.
2. When Golgari Thug dies, it triggers, putting it from your graveyard onto the top of your library.
3. Resolve the Blasting Station ability.
4. Cast Golgari Thug from the top of your library by paying 2 life.
5. When Golgari Thug enters, Blasting Station and Healer of the Pride trigger.
6. Resolve the Blasting Station trigger, untapping it.
7. Resolve the Healer of the Pride trigger, causing you to gain 2 life.
8. Repeat.