Originally Posted by
Triceron
Take Death Knight for example then.
It's based on Arthas from Warcraft 3 right?
And he had 4 abilities in WC3, all of which were Unholy spells. So where does Frost magic come from? Where does Blood magic come from? It comes from other classes, other sources of magic. The WoW DK is more than just 'Arthas', he is also part Lich and part Dreadlord and part WC2 Death Knight and part Necromancer and part Runemaster. They are all over the place too when you look at how the full class was designed. Yet it is united by one common thread - Arthas' Influence over those new themes and powers.
When I point out the Necromancer concept, it is going to be based on Kel'thuzad, and more than just Kel'thuzad. It would be Kel when he was a mage of the Kirin Tor aspiring to learn neceomancy, Kel as Headmaster of Scholomance, Kel as leader of the Cult of the Damned, Kel when he became a Lich and Majordomo of the Lich King, Kel when he was commander of Naxxramas, Kel when he was Lich-lord of the Plaguelands, Kel when he was champion in the Nexus, and Kel as the lieutenant of the Jailer.
Everything that mentioned from using Alchemy to spread plagues and blight, summoning vermin and pests, experimenting on spores, creating various types of undead constructs, and ascending to Lichdom is all derived from Kel'thuzad and everything that was housed in Naxxramas, his personal floating citadel. Each Wing was a representation of various domains he had influence over, and it all ties back to a wider depiction of what a Necromancer is capable of.
Same as how the DK's 3 specs are all represented by Icecrown Citadel's three wings, each having characters that further a domain that Arthas has influence over. Blood, Frost and Unholy are all represented here. Naxxramas is the seat of power that informs what a Necromancer is all about, and even beyond that we have Scholomance having shown us what Necromancers are capable of.
It all comes full circle back to Kel'thuzad influencing the use of these domains, and portraying what a Necromancer is capable of beyond a direct show of power. Necromancers are masters of subtlety and attrition. Patience is their ally, and Necromancers excel in the slow decay of things and making their methods the most effective way of Spreading death and decay. Not by a show of force and a strong arm, but through attrition and manipulation. Poisons and plagues, spiders and vermin, endless armies of undead and the ascendancy into an undead form that persists beyond death is all thematic to what a Necromancer is all about. And yes, they can pull from more than just Kel'thuzads own abilities, because the Necromancer is not just a representation of him as a character, but a representation of his influence. Just as the player DK is not just representing Arthas and Arthas was not just an Unholy DK as he was on WC3; the player class represented his influence over other domains such as Frost powers and raising Frost Wyrms, or Blood Magic and the creation of the San'layn. These are all ties back to the DK class and where their powers originate from.