@JeremyECrawford Hey, Does the epic boon of undectability works on blindsight/magic items or True sight 120ft of demons like Demogorgon ?
— Israfil (@Israfil_ibn_Mik) April 1, 2016
The Boon of Undetectability doesn't stop blindsight or truesight. #DnD https://t.co/K8C4wXl4ql
— Jeremy Crawford (@JeremyECrawford) April 4, 2016