Nightfiend can be found in the following locations: Deep under Drefia.

Nightfiend has 2700 hitpoints. It is immune to earth and death damage. It is strong against physical, energy, and ice damage. It is weak against fire and holy damage. It can neither be summoned nor convinced.

Nightfiend yields 2100 base experience points. Its loot can include platinum coin, gold coin, small ruby, tooth file, blood preservation, emerald bangle, vampire teeth, vampire shield, strong health potion, strong mana potion, red gem, and ring of healing.