User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-6637171-20130328120720/@comment-3481504-20130328230022

Older and stronger demons? RaghavD, look.

1. Lilith, the Queen of the Pit, is dead.

2. Azazel, one of Hell's greatest generals, is dead.

3. Alastair, Hell's exquisite torturer, is dead.

4. Samhain is sealed.

And, Crowley, being the King of the Crossroad demons, is, by extension, stronger than all Black-Eyed demons. So that eliminates an entire class. And, it looks like there's no White-Eyed demons left.