WoW: Cataclysm - Elemental Slayer Enchant
Holy cow! The Elemental Slayer Enchant is amazing! It's unknown at this point if it's intended to be the way it is. Its effect looks like a blossoming radiance that changes colors and size constantly.
The player says it is a bit annoying in dungeons, so it's likely to get some changes based on beta tester feedback.