Yes, will do. Now let's move onto the actual techniques. Seeing as you have mastered several elemental abilities, theres no need to go through how to manipulate the Ninjutsu. So let's jump straight at it.
*I scratch the back of my head as the expression of my face changes, and suddenly a malicious feeling runs up your spine, causing chills. It feels like a dark aura is filling up the area, which is so heavy, you're having a hard time to move at first.
The feeling suddenly vanishes as I let my hand slide down in my pocket.*
What you just felt is an emotion. It's called Killing Intent, being a master at such, is hard and requires a good control of your emotions. As you may just have felt, you had a hard time moving, if possible at all. You're gonna learn how to do so now - By focusing on something that may have happened in your past, to call forth anger, call it upon the target infront of you. Release a wave of pure emotion which simply says death of all beings. O_O