The Sharlayans, yes. They were the Circle of Knowing, and when I met them, Yda and Papalymo, it was in the Twelveswood.

A youngling and his sister's parents were transformed into wildings, and the young man's actions angered the elementals. That's what it seemed to us, and the ritual quelled the forest. Although we didn't know it at the time, the Garleans had invaded the Black Shroud as well.

I can only surmise that the events between these two moments lead to the elemental wrath of that day.