Baernaloth

Baernaloths,[3] also known as the Baern,[4] were legendary fiends of the Gray Wastes, as devoid of emotion and color as the plane itself and among the multiverse's biggest enigmas. Thought to be a type of yugoloth,[3] rumors claimed they spawned not just the daemons, but also the demons, demodands, and devils, and they allegedly knew the most about all creatures of the Lower Planes.[2][5]