Looks like tensei shitara slime is the main worlds cause of the name veldora Ahahhaha ig rimuru got mad and evolve his people to become demons Ahahaha And name the country after veldora( the dragon) AHAHHAHA. but still I wish he meet a dwarf smith to make him a bullet and a new type of gun like in arefureta wishing that he would make machine gun Ahahahha and to get him a new bomb like grenade. 