Arcane Loops of Anger in FoS

[Fuzzyboy]

Has anyone had this drop recently? I've been hunting it for a long time and even after 35 kills on my mage (http://eu.wowarmory.com/character-sh...tol&cn=Myalfon) - no drop. So I just calculated the chance of this item not dropping 35 times in a row and unless my math is way off:

0,87^35 = 0,008 (rounded up) which is basically 0,8 percent (wowhead lists it as a 13 percent drop). I know it can drop, because I have it on another char (mage wasn't on that run) - do any of you know if the droprate has been altered after a patch or something? Or am I just that unlucky?

Edit: Make that 36.