Noxxion

Noxxion is a living symbol of the corruption of Maraudon, created by Lord Vyletongue.

Abilities
Noxxion only does nature damage. He will primarily attack with slam attacks for nature damage. In addition to that, he has a number of other abilities:
 * Uppercut — Will knock you back a short distance and cause damage.
 * Toxic Volley
 * Spawns — Periodically, he will disappear and spawn 5 Noxxion's Spawns.

Group strategy
Because all damage is nature, plate armor does not help. You may want to consider using the character with the most hit points as your tank, which may be a feral druid. When Noxxion's Spawns appear, you can opt to have a paladin with Consecration go in. It is difficult to hold on to aggro, and this is where groups will most often fail on this boss. Use AoE to handle the spawns, heal up if possible (bandages), and then concentrate on Noxxion when he re-appears again.