Hi, sometime ago i met a shaman in a 2v2 arena rated match; he was using 2 weapons from brs that have a set bonus that roots you in place for 10 seconds.
It has a very high chance to proc and doesn't have any kind of diminishing returns.
I think it's an exploit since most low level bonuses like this one do not work at higher level or have a very low proc chance and this proc doesn't have any kind of dimishing returns.
Spider's Kiss - Item Set - World of Warcraft
Enjoy
p.s. didn't try it myself but i think it could help some enhancement shamans or rogue or wars.
p.p.s. i reported the guy who used them into the rated 2v2 matches against me and then i think it will get fixed soon.