The Necromancer could be of human form with the ability to summon swarms of Hobbes,or the devs could have revisited some of the unused creatures from the concept art,there are some truly gruesome hobbe related creatures there.
Here is some text that may whet the appetite a touch;
Found in Ye Olde Art Book page 75
''The nightmare creature started life as a larger,cave dwelling relation of the hobbe.A big,warty,aggressive and much-worshipped totem for the hobbes to rally round.After many pages of scribbles,however,the idea slowly evolved away from this storyline,into a much stranger breed of creature.Huge-jawed and cunning,hiding in the dark underspaces of Albion,and waiting for Heroes to blunder into its grasp.Great fun to draw...and maybe one that will find its way into future installments!''
-Mike Mc Carthy(Senior Concept Artist)
Sorry have no means of posting pics.
'If only I had some sort of handheld image capturing device'