Kelvoras

Kelvoras was the king of the Eladrin from the dawn of civilisation until the final battle of the Shatterwar, when he was killed by the Varharan's lieutenant, Jamargar.
In retaliation, Dialiah cursed the Orcs, promising that "For a thousand years, nothing will survive your footsteps". This translated to a drought in the formerly swampy Orcish nation of Urruk, turning it into a desert. It is unclear as to why Gruel was unaffected.
Following Kelvoras's death, his son (also named Kelvoras) assumed his place as co-ruler of the Eladrin (the king and queen co-rule William and Mary style), but retained his title of Prince, rather than becoming the new king.