There is a couple of god mode mods, but how can you have a god mode without help of any modules or items?
One of the easiest tricks, really. In fact it's also a character editing tutorial.
1) enter your Character screen
2) enter Statistics screen (the bottom left button)
3) export your character
outside the game (Alt + Tab)
4) go to your M&B main folder, and then CharExport folder and open your character text file
From this point on, you can edit your character as you wish.
Giving it e.g. 5555 strength will give the character 5555 HPs, and e.g. 500 charisma will enable your character to have at least 500 troops more!
Or you can simply give your character more attribute, skill and weapon points to distribute in-game and keep your character stats "legal" and honest enough (if you don't have the time to develop your character and you need a strong one from the very start).
5) and now when your editing is finished, save the appropriate character text file, go in-game to the same Statistics screen, and choose Import Character (it will import the same character that was exported). All's done.