Boonweaver Giant + Goblin Bombardment + Shade's Form

Boonweaver Giant

Goblin Bombardment

Shade's Form

How it works

1. Activate Goblin Bombardment 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 Goblin Bombardment ability from step 1.
5. Repeat.