
Originally Posted by
Ulysses S. Grant
Nagash has only had 2 real defeats. The first time he had just raised the dead of an entire continent and was very weak, which allowed a vengeful king armed with the deadliest weapon ever forged and guided and protected magically by the entire Skaven Council of the 13 to "kill" him. Even then he came back, slaughtered an entire skaven clan in a night. His second defeat came at the hands of Sigmar (The greatest warrior to have lived since Aenarion) who walked over mythic beings like they were nothing all the time.
Vlad however is not anywhere near as powerful a necromancer. Firstly Nagash invented necromancy. Second Vlad was only able to achieve the feats of necromancy he did because he had one of the nine books of Nagash. Lastly Vampires are not immortal. They can be killed and permanently destroyed to stop them being resurrected (Don't forget their need to feed, their weakness to faith and their weakness in sunlight). Nagash on the other hand found the one true way to be immortal; become a Litche. He bound his essence to several objects, which mean as long as they exist he cannot die, and one of these objects is the Black Pyramid (A structure that cannot be destroyed by magic or conventional means). Killing him won't stop him, as he simply regenerates inside his pyramid. I also don't think he cares about being a skeleton like creature very much.