The Master, Formed Anew + Cavalier of Night + Spawning Pit

The Master, Formed Anew

Cavalier of Night

Spawning Pit

How it works

1. Activate Spawning Pit by sacrificing The Master.
2. When The Master dies, its second ability triggers, returning itself from your graveyard to the battlefield as a copy of Cavalier of Night.
3. Resolve the Spawning Pit ability
4. When The Master enters the battlefield, its first ability triggers, doing nothing.
5. Repeat.