Boonweaver Giant + Goblin Bombardment + Fungal Fortitude

Boonweaver Giant

Goblin Bombardment

Fungal Fortitude

How it works

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