War is coming.
Discord was not the first God to come to Equestria, but neither is he finished with it. His capture by the Elements of Harmony was only a clever trick, as befits a God of disceipt and trickery. His farce has bought him the time to resume his plans for the miserable world he's been trapped in, and has dredged up the relics of Equestrian History.
The Elements failed to trap him the second time, and the Princesses barely managed it the first time. It will take older magic to put a stop to Discord this time. Harmony can dispell him, but not the Harmony of song and dance.
Harmony is a balance of give and take.
The Blaidd are experts in the art of taking. Bred for the war against the Gods, they present the single greatest threat to Gods of all kinds. But now there is only one.
Turns out that Discord is much worse than most ponies ever imagined. He's back and the only thing that is stopping him from taking over is a lost dog with a penchant for barking up the wrong trees and asking the wrong questions at the right time
Discord returns, and a stranger must now step up to fight against a campaign of destruction. The world must grow cruel once more to survive, this will be the first step.