Combo Skill
Combo is the most powerful, but in the same time, the slowest, Blade Knight attack skill. Basically it's not skill like other skills or spells but sequence of three skills witch trigger additional power.
There are four skills witch can be used in combo sequence.
Cyclone (or other weapon skill)
Death Stab
Twisting Slash
Rageful Blow
"So what, now I can obtain this great PvP power?" you ask? No way! There are few (?) things you have to know.
First. If you want to use Combo you have to do Marlon's Quest part witch is available only for Blade Knight and find Dark Stone. [for more go to Marlons Quest guide]
Second. Sequence can be successful only if you use skills in right order. Always first must go Cyclone Skill (or other weapon skill). After it other two combo skills you like. Which one you choose - it's up to you. But remember! You mustn't launch second, middle skill more than once. Other way sequence fails and nothing happens. So first and last skill in sequence have to hit at least once and second skill only once and no more.
Third. Intervals between skill can't last to long. Launching combo looks easy but you have to find out how fast you have to switch skills etc. Mostly it depends on character's attack speed. After that everything you can do is practice.
In the end come one question. "Why the hell should I struggle with this sequence if it's slow and can easily fail?" Well, remember first sentence? That's how Combo damage is calculated: COMBO DMG = DMG of last skill in sequence + half of total of strength, agility and energy statistics of user. In other words: [Skill DMG + (str+agi+eng)/2]. What is more, Combo hits three times at once. So if you successfully went through launching three skills that's what you get (with characteristic sound):