Upcoming dungeon project

About this image

Tried an attempt to make a Troll Skull, following the normal skeleton Valheim style with glow eyes in middle
Question is.. what could be behind this door? Boss maybe?

I may replace the Door Knob with a Metal Troll hand, I think that would look alot better than the old generic medieval style that we are mostly custom too, possibly replace the hinge with bone part not sure yet