Korax

Korax is one of the three Serpent Riders and is the final enemy. He is confronted after completing the final hub, the Necropolis and entering the Dark Crucible. You must first attack him vigorously until he retreats, then kill all the minions he has left behind before pursuing to finish him off. Korax has plenty of health (5000) and can take a lot of damage before dieing.

Statistics:

Korax launches projectiles from each of his six arms. Korax can 'summon' traps including spikes, fireballs and turning the ground to lava. When Korax retreats he summons Ettins and Centaurs and when you find him again he summons Serpents, Dark Bishops and ghostly Ettins, Centaurs and Serpents.
 * Projectiles
 * Traps
 * Summon Monsters

On  second meeting with Korax he can teleport around the room.

Suggestions

Have some Icons of the Defender, plenty of Repulsion Discs and good luck and when you have killed him stay away from the ghosts that fly around him.