|Location||Bastion Rise, Gorgrond|
Iyu is a massive genesaur and one of the apparent leaders of the botani. Throughout the Gorgrond storyline, numerous hostile Botani are found espousing that their destructive ways are "the will of Iyu," showing they serve under him. He is served by the Voice of Iyu.
He is first seen destroying Naielle's Watch during , destroying the Alliance camp and creating a wave of chaotic plants and life in it's wake. During the Lumber Mill campaign, the commander battles Iyu's botani servants alongside Draka and Kaz the Shrieker, or Rangari Kaalya and Yrel. Chasing the artifact that has the power to control genesaurs, the party arrives at Moira's Reach and are finally confronted by Iyu. The genesaur and its minions are killed during . Its skull was then taken to the Broken Horn Village.
- Genesis — Empowers allies with the gift of Genesis.
- Ground Stomp — Stomps the ground, inflicting 4 Physical damage to all enemies within 20 yards, knocking them back.
- Grow Vine Beast — Grows a Vine Beast to attack nearby enemies.
- Patch 6.0.2 (2014-10-14): Added.