Unidentified Sith Eternal prophecy

Generations before the era of the New Republic, an ancient prophecy foretold the coming of a Dyad in the Force, a unique Force-bond connecting two Force-sensitives physically and mentally through the Force. The subject of the prophecy was featured prominently in the lore of the Sith Eternal, a cult of Sith loyalists. The dyad from the prophecy was formed by Ben Solo–a former Jedi who fell to the dark side of the Force and became the master of the Knights of Ren and Supreme Leader of the First Order–and Rey–a Jakku scavenger who became the last Jedi in existence after Luke Skywalker's death.