The Senoculus is a six eyed demon wandering the black planes of elsewhere.Taking the form of Odd Thomas it has earned the title'The other Odd' while it has another form, still human, but with the head of a bull, while still keeping its six eyes. :P
Apparently it has no known weakness. A whole magazine from a deagle was emptied into this terror but with no effect, there weren't even any wounds.
It could snap you, or rip you in half, but apparently its favored method is stealing the victim's soul.