Mu Online/Dark Knight

The Dark Knight is mostly a physical damage melee character. Using swords, axes and various short range weapons to do damage. Most of their stat points are added to Strength and Agility.

Using Combo Skill
The Combo Skill is a Blade Knights' exclusive ability. After completing the Gain Hero Status quest, they may use the combo. In order to use it, you must have a weapon with skill.

You need to strike the enemy 3 times with certain skills: Weapons skill >> Twisting Slash/Death Stab/Rageful Blow >> Twisting Slash/Death Stab/Rageful Blow. NOTE: The last 2 attacks must be different

If done properly, a blue shockwave will appear, and the monster would suffer immense damage.

Skills
A DK has the following character skills: Twisting Slash, Impale (can only be used when riding a mount unit and wielding a spear-type weapon), Greater Fortitude, Death Stab, Rageful Blow, Combo Skill (which is a combination of Twisting slash, Death stab, and Rageful blow, all executed in quick succesion), and Raid (which comes with every Dinorant). There is only one shield skill that can be used called Defend. Dark Knight weapon skills include Falling Slash, Cyclone, Stabbing, Uppercut, and Slashing.

Defensive Skill
This skill is available on some shields. Use results in all damage dealt in the following 2-3 seconds to be halved. The skill may be used constantly, making it harder to hurt the Dark Knight.
 * Cost: 30 Mana

Hacking
Most commonly found on Axes (may be referred as the Falling Slash skill). The user of this skill jumps, then hit the target from the air. It can be used to hit far enemies (up to 2 squares away), this skill will often shake the target and will move it.
 * Cost: 9 Mana

Cyclone Cutting

 * Cost: Unknown
 * Requirements: Unknown

A virtue of the Double Blade and Thunder Sword. The sword is flung left and right at great centrifugal force - cutting monsters in two.

Mu-Online Movie

Twisting Slash
This skill requires any weapon. The Dark Knight will skilfully spin the weapon around him on the ground, causing damage to any target in his immediate surroundings.
 * Cost: 10 Mana, 10 AG
 * Requirements: Level 80