Like in title, I want to make some custom heroes with custom skill sets, skill trees, and unit bodies. Yet, in the comprehensive community modding guide, there is no section for adding new Heroes, and I've tried reverse-engineering the hero initiating code, without success. 

Anyone knows how to add a completely new hero? Pls help

The easiest way would be to download one of the mods that already add heroes (like Endless Heroes) and see how they do it. 

Yeah I did that, but was not successful in mimicking their way.