Boonweaver Giant + Goblin Bombardment + Kaya's Ghostform

Boonweaver Giant

Goblin Bombardment

Kaya's Ghostform

How it works

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