Mairon, Disciple of Melkor

Indestructible, menace, trample
If a creature equipped with an artifact named
"The Black Sword" deals combat damage to
Mairon, exile Mairon, Disciple of Melkor.
When Mairon, Disciple of Melkor dies, you may
put it into its owner's library third from the top.
But Sauron was not of mortal flesh, though he was
robbed now of that shape in which had wrought so
great an evil.