Maeglor

His Majesty Maeglor, King of Est Tayiar was elven monarch rulling non-humans realm in Pontar Delta about one century before First Landing.

Reign
He was a great king, and (by elven standards) Est Tayiar became a great city with impressing Royal Palace where he was residing, later when he his serviles died one by one on uknown disease (likely plague or cancer) he cast a powerful spell that caused the earth to swallow the city whole so that no outsider could ever desecrate it''. ''

Trivia

 * He is inspired by Maglor from Lord of the Ring the second son of Fëanor and Nerdanel.