Could this be a hint as to what is to come next for WoW Classic, some sort of Cataclysm content mixed with WotLK systems?
“In the corners of Azeroth, stories are told of a dreaded dragon who swept a pall of torment over the land. In some versions of this story, his fiery presence brought cataclysmic death and destruction worldwide. In other versions, he is blue.”
Azure Worldchiller (Top) & Obsidian Worldbreak (Bottom)
