While they were stopped and countered by Downworlder reinforcements, all of whom were informed and prepared by Valentine's wife, Jocelyn, and former parabatai, Luke, there were still several casualties.
In the Bible, the Nephilim were the offspring of humans and angels, although it is unknown if they really existed or not.
In the Shadowhunter's Codex, the Angel Raziel is said to have named Jonathan and his new breed after the Nephilim of the Bible, even making references as such, though this too is unknown as no official records exists of what exactly happened that day.
The legend of the origin of Shadowhunters is that they were created more than a thousand years ago, when humans were being overrun by demon invasions from the other worlds.
A warlock summoned the Angel Raziel, who mixed some of his own blood with the blood of men in a cup, and gave it to those men to drink.
In 1991, a great tragedy called the Uprising occurred during the signing of the Ninth Accords.
A group of dissidents called the Circle and led by Valentine Morgenstern considered the Clave and Covenant outdated and in need of reform.While Sebastian was ultimately defeated, it was too late as a large majority of the Shadowhunters gathered at Alicante had already been slaughtered.To salvage their population and ranks, the Clave decided to reopen the Academy and recruit more mundanes for Ascension.In 1872, the Shadowhunters signed the first of the Accords, becoming the first step in the peace negotiations with the Downworld populace.In 1878, the Shadowhunters of the London Institute faced the Magister and his clockwork army, whose intent was to create a formidable new race of half-Nephilim, half-demon beings, with the first of their kind, Tessa Gray, capable of several unknowable abilities—one of which was the power to Change when the demon parent is an Eidolon.Their agreement came to be known as the Cold Peace.