Dream Demon Bill

This strange, four-armed fiend appears to be constructed completely out of golden stone in the shape of a triangle, glowing with a hellish red. One eye stares through you with mischief. It wears a thin top hat, but somehow it radiates destruction and drains you of hope, making your surroundings seem evil and monochrome.

"Dreamon" Bill is a multidimensional being from the depths of Hell, bent on causing chaos and destruction wherever it happens to be.

Abilities
Any within close proximity feel their hope drain away, leaving them lost and frightened.

It is able to breathe a cloud of acidic, disease-ridden smoke, can see through illusions, and is resistant to electrical ,acidic, cold, fire, and poison, as well as damage not caused by adamantine weapons, weapons comprised of silver, or enchanted by goodly beings. Even if its stone-like exterior is pierced, its blood will spew forth, coating all nearby in its exceptionally slick vital fluid. The wounds will immediately begin to close up, unless they were caused by good or silver weapons.

Its mind cannot be read, it can see invisible creatures, and heavenly creatures cannot approach it.

While all of this makes it incredibly dangerous in combat, Bill prefers to subdue his foes without a fight, by making demonic deals which end up benefiting it more than those it bargains with, if it benefits them at all. Most of all, however, it prefers to attack the minds of those that are sleeping, devouring their dreams until they fall into a permanent coma, or enslaving them to its will.

Connections
It seems to have some intrinsic connection to John. It may also have influenced Liam's early life.

As both John and Liam are members of the crew of the Spellglider, it is of no surprise that they have interacted with and defeated it on two separate occasions- both in mindscapes. The group's success has made them a target of Bill's ire, and unless it is defeated in the flesh, they may never be rid of it.

Equipment
Bill appears to have been launched to multidimensional status upon acquiring a portion of the Book of the Damned, specifically that detailing demons themselves. Using this has put it on the level of a demon lord, a title it most certainly holds over others tauntingly.