New spells.

While he's accumulating a large amount of mana, you can revive all the killed units. ....

I was actually talking about this... About how you were raising the dead. Did you max out your magic skill?
And I didn't claim that I'm leveling up a Necropolis faction with Hive, but I stated that ONLY it can use Hive together with active resurrection, which I think I convincingly proved.