The Chase for Dragon Motes, the event coming in with update 1.4, Legacy of the Fallen, now has some stellar lore up on the Official Rift Website to go with it. Check it out.
Greenscale and Akylios have been slain, their boundless elemental power scattered across Telara. Where this power pools, it congeals into Dragon Motes, which can be broken to harvest the very essence of Life and Water. Now Guardians and Defiant race House Aelfwar, the Abyssal, and each other to claim this magic and keep the dragons from being reborn. Daily quests, epic gear, and the exotic Mossy Tartagon mount await any who master the Dragon Motes.
Read more about The Chase for Dragon Motes at the Official Rift Website.