Several mistakes are listed on the Kamael skills page. On PTS I did not get a stun shot of any kind. However I did not play after the last patch of which Warp and another skill was added. I'm not sure but I think the other skill was called soul shock? Which is a warder stun skill from my understanding.
That lvl 36 skill is a close range crossbow attack that makes the targetted monster "panic".
I tried, (200 range) it lasted for 2 seconds and the mob was back on me XD. Useless skill to let in the skill list ;)
If someone found an utility at that skill, please let me know :)