Boonweaver Giant + Yahenni, Undying Partisan + Changing Loyalty

Boonweaver Giant

Yahenni, Undying Partisan

Changing Loyalty

How it works

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