Gravemind (Earth-4552)

"We meet again, young one. You wish for the truth, so I will present you with it. I am the last of those who your master gave you breath and shape and form, billions of eons ago. I am the last of those your leaders rose up against and ruthlessly destroyed. I am the last Pæter, I am the first Flöd; a Gravemind. And our answer is at hand"

- - Gravemind

The Gravemind, also known as the Brethren, the Primordial or The Timeless One is a Flöd, a being who existed long since the creation of Nirn and Mundus by Anu and Padomay, coming from the Void itself and the ones who existed before the Gods and the Dædra. During the long War of the Twilight, the Gravemind proved it's might by almost tearing the combined forces of Eru, the Valar and the Maiar, effectively turning Morgoth into the dark side in the form of Melkor, who, in his madness, created the Aptrgangr with the Masque of Clavicus Vile from the Atmorani and other Valar in the hopes a immunity of the Flood could be found, which never occured.

Despite it's defeat and destruction in the war, the Gravemind's councioness forever inhabits the body of other collective entities known as Graveminds, each one of those sharing the memories and councioness of other Graveminds, making it, and them, basically immortal.