Activate Umbral Collar Zealot by sacrificing Boonweaver Giant
When Boonweaver Giant dies, False Demise triggers, returning Boonweaver Giant from your graveyard to the battlefield
When Boonweaver Giant enters, it triggers, returning False Demise from your graveyard to the battlefield attached to Boonweaver Giant.
Resolve the Umbral Collar Zealot ability from step 1.
Repeat.
This ingenious loop turns a simple sacrifice outlet into an endless cycle of rebirth by letting Boonweaver Giant constantly recur its own revival machinery. You sacrifice the Giant to Umbral Collar Zealot, sending it to the graveyard alongside the Aura attached to it. The clever placement of False Demise ensures that whenever the Giant dies, it immediately returns to the battlefield—which in turn triggers the Giant's own entry ability to fetch False Demise right back to itself. This creates an unbroken loop of sacrifice and resurrection that fuels infinite death triggers and endless surveils.