Activate Woe Strider by sacrificing Shepherd of the Cosmos.
When Shepherd of the Cosmos dies, Fungal Fortitude triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
When Shepherd of the Cosmos enters the battlefield, it triggers, returning Fungal Fortitude from your graveyard to the battlefield attached to Shepherd of the Cosmos.
Resolve the Woe Strider ability, causing you to scry 1.
Repeat.
This clever loop turns Woe Strider into an engine of endless sacrifice by utilizing Fungal Fortitude to constantly resurrect its victim. Whenever you feed Shepherd of the Cosmos to Woe Strider, Fungal Fortitude steps in to return the Shepherd straight to the battlefield. That new arrival immediately triggers Shepherd of the Cosmos's own ability, pulling Fungal Fortitude right back out of the graveyard and reattaching it to start the cycle anew.