Scripts for beginners.

Okay, but why isn't the MakeHeroNecromancer function suitable? It turns any hero into a necromancer with dark energy.

The main hero initially has dark energy and the necromancy skill, but he is a Knight class. I need this Knight to be removed from the map and replaced with a hero with the same name, but with a custom necromancer skin (taken from NHF and edited) and the Necromancer class.