Someshta is the last of the Nym. Someshta is more commonly known in the series as "The Green Man." The Nym were artificial constructs made through use of the One Power during the Age of Legends. Originally entrusted as the gardeners of the world, they had extensive ability to manipulate the life and growth of plants around them. Shortly before the full onset of the Breaking, the Last Aes Sedai council charged Someshta with guarding over The Eye of the World sanctuary, where several artifacts of great power were housed, along with one of the seals on the Dark One's prison. He dies by the One Power at the hands of Balthamel (Someshta manages to kill Balthamel in his last moments), one of the thirteen Forsaken, in the final chapters of The Eye of the World.
Read more about this topic: Minor Wheel Of Time Characters