a Casting "Cancer" Mage?

[umbergod]

like a mage that specializes in diseases and disease themed spells. Why doesnt the Cancer Mage do this?!

[Flickerdart]

Just get Spell Thematics. Immunity to disease is so easy, and its effects so slow, that short of spamming Mummy Rot (and even that has an incubation period two or three times as long as a typical encounter) you're not going to get very far ahead with pestilence-based abilities.

[umbergod]

I didnt mean strictly using spells like contagion, but rather disease and waste being the theme. Im guessing basically it would just be a necromancer >.> I hadnt slept in a while when I made this post :P

[Corlindale]

If you're using PF material, this sorceror bloodline seems to fit quite well: http://www.d20pfsrd.com/classes/core-classes/sorcerer/bloodlines/bloodlines-from-paizo/pestilence