The file is located in the resources, in h3bitmap.lod. For convenience, extract the file and place it in the data folder (you don't need to pack it), open it with Excel, and use it. After making changes, save it, restart the game.
to AlexSpl
Also, I would like to be able to search for a hero based on the following criterion: who gets +10 attack first. I think it shouldn't be difficult to implement.