Danitha, Benalia's Hope + Spawning Pit + Shade's Form

Danitha, Benalia's Hope

Spawning Pit

Shade's Form

How it works

1. Activate Spawning Pit by sacrificing Danitha
2. When Danitha dies, Shade's Form triggers, returning Danitha from your graveyard to the battlefield tapped.
3. When Danitha enters the battlefield, it triggers, returning Shade's Form from your graveyard to the battlefield attached to Danitha.
4. Resolve the Spawning Pit ability.
5. Repeat.