Decapitates with a flick

He looked to the Force for guidance, and the Force restrained him. A pained cry cut through the chaos, and the crowd of prisoners parted just long enough for Shryne to see Chatak down on her knees in front of Vader, her sword arm amputated at the elbow. Vader had simply beaten her into submission, and now, with a flick of his bloodshine blade, he decapitated her. Sorrow lanced Shryne's heart.

Dark Lord: The Rise of Darth Vader, Part II, Page 74