Nurgloth the Eternal

Description
Nurgloth the Eternal is a Chaos Sorcerer Lord and chief rival of Burblespue Halescourge. He is the boss at the end of The Enchanter's Lair mission, where the Heroes finally catch up to him.

Nurgloth's appearance is similar to the Blightstormer, though he is larger with no tattoos. He wears a fiery metal mask and shoulder guard and carries a scythe, collectively called Soulseethe and Mortibundus.

The armour and scythe were forged on the Altar of Bone, deep within the Realm of Chaos, possibly containing the essence of twin daemons.

Attacks
In the first half of the fight he alternates between being out of range while you fight off hordes, only coming down to call forth rings of fire. Avoid the fire by standing outside of the glowing orange rings.

In the second half of the fight he flies after players while swinging his scythe.

Strategy
When he is up out of reach, your ranged attacks will do no damage to him. Your best bet for damage is when he tires himself out in the center, after the yellow rings.

Keep an eye on the ground. Nurgloth's magic will create yellow rings on the ground before they explode. While the area directly around Nurgloth is not glowing, it is safe to move in and attack with melee.