I Saw Solis - Achievement - World of Warcraft
Cause three Piles of Ash to form Solar Flares at the same time during the Rukhran encounter in Skyreach on Heroic difficulty.
We just did this on normal and got the achievement. We had a group with no level 100s in it so there is no way it was heroic. I'm not sure how I can post proof without revealing my char name, but try it for yourself and report back.
