Boonweaver Giant + Shilgengar, Sire of Famine + Shade's Form

Boonweaver Giant

Shilgengar, Sire of Famine

Shade's Form

How it works

1. Activate Shilgengar by sacrificing Boonweaver Giant
2. When Boonweaver Giant dies, Shade's Form triggers, returning Boonweaver Giant from your graveyard to the battlefield
3. When Boonweaver Giant enters, it triggers, returning Shade's Form from your graveyard to the battlefield attached to Boonweaver Giant.
4. Resolve the Shilgengar ability from step 1.
5. Repeat.