Activate Viscera Seer by sacrificing Boonweaver Giant
When Boonweaver Giant dies, Fungal Fortitude triggers, returning Boonweaver Giant from your graveyard to the battlefield
When Boonweaver Giant enters, it triggers, returning Fungal Fortitude from your graveyard to the battlefield attached to Boonweaver Giant.
Resolve the Viscera Seer ability from step 1.
Repeat.
This clever loop relies on a self-sustaining cycle of rebirth between Boonweaver Giant and Fungal Fortitude, with Viscera Seer acting as the sacrificial engine that keeps the momentum going. When the Giant meets its end at the Seer's altar, the Fortitude's triggered ability steps in to immediately return the giant to the battlefield, while simultaneously using its own entry trigger to retrieve the Fortitude right back. This seamless handoff lets you churn through your entire library with infinite scrys while generating an endless stream of death and entry triggers.