Sun Titan + Viscera Seer + Shade's Form

Sun Titan

Viscera Seer

Shade's Form

How it works

1. Activate Viscera Seer by sacrificing Sun Titan.
2. When Sun Titan dies, Shade's Form triggers, returning Sun Titan from your graveyard to the battlefield.
3. When Sun Titan enters, it triggers, returning Shade's Form from your graveyard to the battlefield attached to Sun Titan.
4. Resolve the Viscera Seer ability.
5. Repeat.