This enslaved Bewilderbeast appreared in the HTTYD 2 movie and is owner by Drago Bludvist.

Enslaved when it was just an egg, this Bewilderbeast is not really tamed, since it was controlled against his will. Since the momenth of his birth, he had been used as Drago's personal war machine and Drago does not feel anything towards this white giant, as it is only a tool to gain control of the world. By using his power, Drago takes control of all dragons he meet, even of Toothless. In the end, he is defeated by the Night Fury, even loosing one of his tusks and, after bowing to the newly alpha Toothless, he retires in the sea, leaving permanently Berk.