http://www.wowhead.com/?item=42397
this item just fucked our night
we tried to kill magni bronzebeard with 4-7 raid groups, 1 priest (ONE!!!!!) wiped all raids because he used that glyphe and dispelt magni -> 6 % heal = ~340k heal points
i dont think this is working as intented.
blizzard need to change that glyphe so it doesnt affect NPCs or complettly change that glyphe...