Slaughtered

This erratic ghostly figure only made one action; he actually made several actions simultaneously, but it was impossible to classify them as separate actions due to the degree of their simultaneity: his left foot silently but with visibly thunderous speed went straight up one of the assassin's crotch, while his left hand landed on the throat of the second assassin, and poked a big hole in it. No one saw the speed with which his right hand reversed the neck of the third assassin, and left him staring at his own buttock….luckily; then, both his elbows landed straight into the back of the fourth assassin, who was facing the other side at that moment, unaware of this mysterious figure's presence behind him...

Even though the assassin's back was unable to resist the elbows, and crumbled inwards under the effect of the dual-elbow strike, his body's flesh showed no signs of any injury!