This "Wulvven" character is one that I created alongside Wolf King Customs. It was designed by me and sculpted by Walter DeMarco.
The recipe here on Skoll is actually pretty easy. It uses the custom head and feet from Wolf King on a Baron Volligar base body with the torso and loin painted fully black. For my version of Skoll, I also have him the capes from a King No’Glin, but that is certainly an optional addition.