Notes:

To be fair to Nagash though, magical nuclear bombs weren't invented when he originally built his flying death pyramid of doom.

I know you guys are more familiar with WH40k, so to explain what Nagash's Black Pyramid was, picture a Necron Monolith powered by MAGIC!!! instead of SCIENCE!!! and the best weapon the enemy have to use against you is a medieval cannon.

Yeah, it's no surprise this thing alone almost destroyed the Empire before Chaos even set foot in Nordland.