Advanced Necromancers are Necromancers with a high understanding of Necromancy. Once regular Necromancers learn enough, they are advanced to Advanced Necromancers. Unlike regular Necromancers, the Advanced ones are killed and Brought back to life in Human form. Some of the Highest known Necromancers are Kel'Thuzad, Gothik the Harvester and others.
Necromancers have dated back to the time of Orcs, but none of the Orcs have ever made it the highest except for Gul'dan. Necromancers, Demons and Necrolytes are the only ones who can get enough Knowladge to become Advanced Necromancers. In short, Advanced Necromancy is when a Necromancer can summon alot of powerful and humongose Undead creatures. Advanced Necromancy also contains the ability to summon Demons as well. Many Advance Necromancers relly on their Necromancy and Spells. Pretty much there all spellcasters. There have been some that do fight up front with the enemy, but not most of the time.
8. Medivh A powerful Warlock of good Unknown
9. Teron Gorefiend A Deathknight of the Seconed War Unknown