Old Knight

the armored knight is a special enemy that appears in the mines (level 5). killing him will also get rid of the spectral knight who wanders the halls of the mine, and allow the player to talk with Nosramus.

the armored knight has an interesting fight, instead of just killing the enemy, the player must destroy every part of his armor

Strategies: upon death the knight drops nothing, but allows the player to enter Nosramus' study, with 2 bookshelves, a regular shelf, some potions, and a chest (though she'll refuse to talk to you once the chest is opened)
 * An explosive vial is highly recommended for this fight, as it destroys all appendages instantly, effectively killing the boss
 * if the player lacks an explosive vial or is using it for a different purpose, then i recommend bringing teammates, whether it be the girl or ghouls, the more the merrier. hack off as many armor pieces in one turn and then flee the next, as his vertical swipe is lethal and attacks all party members, and will be joined by the spectral knight in ~2 turns