A Dark Knight Guardian wielding a Giant Cleaver
Dark Knight Guardian is a level 40 boss found in the Gladiators Den and Drawde Gladiators dungeons. They have 139,000 HP and 1,511 MP though they do not seem to cast any spells with it. Using melee attacks these bosses can deal 1,511 damage and they have a defense of 500.
Dark Knight Guardians drop the following items.
Liquid Blade at a 5% drop rate.
Giant Cleaver at a 10% drop rate.
Blood Sabre at a 15% drop rate.