Episode 20: Bloodborne Platinum Trophy Guide - Yahar'gul, the Unseen Village. Upon the defeat of Rom, the Vacuous Spider, the Hunter will be teleported to the area to the right of the Grand Cathedral, underneath the Lesser Amygdala that transports them to the Lecture Building if they are carrying the Tonsil Stone. The door underneath this Lesser Amygdala is now unlocked, and beyond is the Yahar'gul, the Unseen Village. Important events:

5:00 - Upper Cathedral Key
5:40 - Tiny Tonitrus
23:40 - Clawmark rune
30:00 - Arcane Lake rune