Boonweaver Giant + Umbral Collar Zealot + Gift of Immortality

Boonweaver Giant

Umbral Collar Zealot

Gift of Immortality

How it works

1. Activate Umbral Collar Zealot by sacrificing Boonweaver Giant
2. When Boonweaver Giant dies, Gift of Immortality triggers, returning Boonweaver Giant from your graveyard to the battlefield
3. When Boonweaver Giant enters, it triggers, returning Gift of Immortality from your graveyard to the battlefield attached to Boonweaver Giant.
4. Resolve the Umbral Collar Zealot ability from step 1.
5. Repeat.