Ennead Necromancer

The Ennead Necromancer is an uberboss located in Kurast 3000 BA, found at the entrance of Torajan Jungles via a Red Portal, they act as the commanders of the skeleton army found in the uberlevel. Three of them are found in the uberlevel, one in each corner that isn't the starting one.

They act mostly as debuffers and summoners rather than fighters, their Nightmare curse has huge range and will render your potions useless while also slowing your walk speed considerably. Miasma is their main damaging attack, which is cast from a very long range (aprox. 1 screen) and will slow you (this slow stacks with Nightmare slow to completely nullify your mobility). Both of these attacks are gated by a cooldown; so the Necromancers will spam Dark Summoning directly on top of you while these skills ready; so expect to be swarmed by skeletons. Finally, Poison Flash is used as a last stand skill should an enemy engage in meele, and can be quite damaging if you lack poison resistance.

Despite all of these attacks, once the nearby Shadowgate Totems fall, eliminating the necromancers is easy, they are not particularly tanky, lack immunities and can be animation locked unlike most uberbosses.