Boonweaver Giant + Fool's Demise + Yahenni, Undying Partisan

Boonweaver Giant

Fool's Demise

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Boonweaver Giant
2. When Boonweaver Giant dies, Fool's Demise's first and second ability triggers.
3. Resolve the first trigger, returning Boonweaver Giant from your graveyard to the battlefield
4. When Boonweaver Giant enters, it triggers, returning Fool's Demise from your graveyard to the battlefield attached to Boonweaver Giant.
5. Resolve the second Fool's Demise ability, doing nothing,.
6. Resolve the Yahenni ability from step 1.
7. Repeat.