FOSS gamedev and creative worlds

Hi everyone!
Im thinking of trying to make my own mobs. I need some suggestions, tips, tutorials, also we could upload our own custom mobs here in this thread. ^_^

You should make goblins and each one have a different rank and cave trolls and ogres as bosses to dungeons

Nice idea!
Recently, I tried making a new mob and the only way I was able to test it was by replacing the mobs that was in the game already. Does anyone know how to actually add a new mob into the game?

couldn't you just take an existing mob duplicate the code and change name and settings accordingly?