I started my priest back in early 2010, i was happy with shadowform but even more with dispersion...BUT i quickly noticed it had a cool effect.
You have the possiblity to become invisible, and by that i mean your whole character. I first noticed when i was just messing around with dispersion, mounting, entering and leaving shadowform, don't ask me how i did it, but suddenly my priest wasn't there any more, at first i was like, did i zoom in? so i zoomed out but nothing happened.I didn't know what to do, i wanted to alt-f4 the game and restart it, but i dismounted first and there was my priest again.
Now... 1 year later i leveled my priest to 85, and i was thinking if the bug was still there...so i tried and it was still there. I was leveling in Sholazar Basin at the moment when i asked random players if they had free minute just to test if i was also invisible for them, strange enough, i was. They couldn't see my character, the only thing they could see was my name tag, but that was because they had targeted me. After that i decided to post a how-to-become-a-stealted-shadow-priest-video on youtube.
How you become invisible:
-have to be in shadowform.
-while in dispersion, get on your mount.
-after mounting, EXIT shadowform.
-then dispersion fades and you're invisible.
i also would wanna know...how many of you priest players know about this "stealth ability"?
EDIT: Bravehéart posted my video, thanks for that