Spawning Pit + Sun Titan + Faceless Butcher

Spawning Pit

Sun Titan

Faceless Butcher

How it works

1. Cast Faceless Butcher by paying its mana cost.
2. When Faceless Butcher enters, its first ability triggers, exiling Sun Titan.
3. Activate Spawning Pit by sacrificing Faceless Butcher.
4. When Faceless Butcher dies, its second ability triggers, returning Sun Titan from exile to the battlefield.
5. When Sun Titan enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield.
6. When Faceless Butcher enters, its first ability triggers, exiling Sun Titan.
7. Resolve the Spawning Pit ability.
8. Repeat from step 3.