History of Equestria - Chapter 4 - The Misrule of Groomercord

With the Pillars trapped in limbo and Celestia and Luna not of age there was no one to oppose the arrival of Groomercord, Lord of Chaos.

An emanation of chaos itself, Groomercord the Draconequus was a cosmic entity from a higher dimension that he referred to as 'Chaosville'. Possessing the sadism and selfishness only omnipotence could foster, after growing bored with affairs in his home dimension he landed in Equestria and began toying with its inhabitants using his reality warping powers. His chosen form bearing a deer antler on the right, a blue goat horn on the left, one long fang, different-sized pupils, a snake tongue, a goat beard, and white bushy eyebrows. He has the right arm of a lion, the left claw of an eagle, the right leg of a lizard, and the left leg of a goat. In addition, he has a bat's right wing, a Pegasus' left wing, a horse's mane, and a dragon-like snake's tail with a white tail tuft.

After a rather one sided encounter where Groomercord tormented them until he got bored, Celestia and Luna retreated on a quest to find something that could topple the tyrant once and for all.

Meanwhile Groomercord continued to play with the inhabitants, dominating Equestria "in an eternal state of unrest and unhappiness", taking no thought to manipulating his subjects mentally or physically for a cheap laugh, transmogrifying the landscape on a whim and hurling the astral bodies about like billiards, the moment immortalised in glass of his reign is tying ponies up in puppet strings and dangling them over a billowing inferno. Meanwhile Celestia and Luna wandered far and wide for several decades searching for their answer before discovering the solution had been beneath their hooves all the time; in a secret cave beneath their home had grown The Tree of Harmony, a crystalline structure bearing symbols of their rule at its trunk and at its head a six pointed star, with six branches bearing six gems of varying hues.

Naming these gems The Elements of Harmony they each contained the power of one of the Virtues of Equestria; Laughter, Loyalty, and Honesty for Luna with Magic, Generosity and Kindness for Celestia. Armed with these artifacts they returned to face Groomercord once again, however he had already perceived their plan and though the Lord of Chaos was confident as he had defeated similar powers in far flung corners of Equestria during his rule he was not a fool and had already laid a backup plan before they arrived to poison the bedrock of their power, the Tree of Harmony itself.

He mocked them assuming that even if they succeeded it would not be for long, laughing as they called upon the Elements to produce the Rainbow of Light which transformed Groomercord to stone assuming his confinement would be brief. However he had miscalculated; the Tree of Harmony even without its Elements kept Groomercord's poison at bay for over a millennia and he had not reckoned the strength of the Two Sisters into the bargain who would continue to wax in power and even when their connection to the Elements would be lost were able to keep him contained in his granite prison for several ages to come.