He is a member of TBI who turned the other way. "Commander of the Royal Army, assumed dead in the collapse of his unfinished home." Spawn cannot be blocked.
Damage Taken From Elements
The Black Knight never retreats.
For Druids and Sorcerers, very hard creature to hunt, forget your Icicle and your Stalagmite runes here, since he is immune to Earth and Ice Damage. Since they are resistant to all other elements, all you can do is hit it with whichever attack you have, or use Explosions. Use Physical Strike/Death Strikes against this creature.
A basic strategy consists of the Knight blocking the Black Knight and Challenges it whenever it retargets, while the Druid/Sorcerer uses the above. But the most efficient duo-strategy to kill it faster would be a Knight blocking while a Paladin uses Divine Missiles. Not a good creature to do a fast hunt since it takes a really long time to respawn. It is possible for a Paladin to solo this creature at level 50. It is reccomended that you take either Royal Spears or Enchanted Spears and a good shield, though you should kill the Bonelords first to avoid mana drain. If you can, also kill the Scorpions too. This will dramatically increase your chances of succeeding.
0-135 gp, 0-3 Spears, Dark Armor, Battle Hammer, Dark Helmet, Halberd, Plate Armor, Rope, 0-2 Brown Bread, Brass Legs, Steel Helmet, Two Handed Sword, Knight Axe (semi-rare), Warrior Helmet (semi-rare), Knight Legs (rare), Ruby Necklace (rare), Knight Armor (rare), Dragon Lance (very rare), Lightning Legs (very rare), Piggy Bank (very rare), Boots of Haste (very rare).