In BG3, you will find yourself doing a lot of quests ... The quest can be started upon its initiation and involves saving Wulbren and Tieflings from the prison. It is concluded when you do another ...

Tiny specks of blood cover this amulet. They have pooled into the engravings on the back, spelling out the name 'Wulbren' in a grisly brown hue.

See Invisibility Almost Never Works . The Baldur's Gate 3 community seems to be quite annoyed at how terrible this spell is ...