[@TheWizardLizard] Alright, Ill include the lair, but as for any servants or anything Niddhog has none, he doesn't trust any living creature near his treasure hoard, and he is too prideful to enlist help initially.

Edit: btw, it is possible to either steal from or persuade him to hand over some of his magical weapons and equipment in his treasure horde, so he can also be a supplier to other villains.