Tar-kalion

Tar-kalion was the last King of Númenor, who made quite a name for himself as the mortal tyrant of his time. After usurping the sceptre from his cousin Tar-míriel by forcibly marrying her, he put in effect several much-loathed policies that were in firm opposition to the teachings of the Elves and the ban of the Valar.

Resentful of Sauron's expansion in Middle-earth, Tar-kalion sent his emissaries to Sauron bidding him impatiently to Númenor. Believing the latter's knowledge would only strengthen his rule, the King forged an alliance with him, though he found himself meddling with a being of far greater stature and became a slave to the fay's will more so than he realized. Tar-kalion erected a "Temple", where he promoted the adoration of Morgoth and Sauron, while severely punishing the practice of the true faith in Ilúvatar.

Tar-kalion's attack on the Valar with his great armada at the urging of Sauron brought about the Sinking of Númenor, as well as his own downfall. The warships was consumed by the waves and the King was imprisoned beneath the earth, in the Caves of the Forgotten, to stay there until the Last Battle.

Appearances

 * The History of Middle-earth series
 * The Lost Road and Other Writings
 * Sauron Defeated