Kosmo's appearance was definitely a shock to everyone, the man included.
He fired off the sphere and it fully engulfed the man while the others quickly retreated to avoid getting hit as well.
Gideon was the only exception though as he refused to get too far away from the guy for fear of him getting away and attacking the others. As a result, he could feel the residual energy from the orb against his skin trying to peel off his flesh.
When the orb dispersed, the guy for the first time since the fight started looked weakened and heavily injured as numerous parts of his skin was missing revealing muscle tissue and bones.
Gideon didn't let go of the opportunity and rushed forward like a phantom, appearing under the guy's face and slashing upwards at his chin.