Elden Ring PC | How to get to the Abductor Virgins boss from Schoolhouse Classroom site of grace

This video not only shows how to get there, but also explores the area for items. I included the boss fight at the end.

If you want to see just the boss fight: https://youtu.be/qSxJwHTf9Rc

Location: A secret underground area within Volcano Manor

Drops:
10,000 runes
Inquisitor's Girandole

Abductor Virgins
"Abductor Virgins is a Field Boss in Elden Ring. These two deadly constructs are found beneath Volcano Manor. This is an optional boss as players do not have to defeat it to advance in Elden Ring. Abductor Virgin is the normal enemy version of this boss."
https://eldenring.wiki.fextralife.com/Abductor+Virgins

Inquisitor's Girandole
"Inquisitor's Girandole is a Spear in Elden Ring. The Inquisitor's Girandole scales primarily with Strength, Dexterity and Faith. It is a good Weapon for medium reach when in melee combat."
https://eldenring.wiki.fextralife.com/Inquisitor's+Girandole