ogres,goblins and orcs

My idea is to add two new structures, one in the overworld and one in the caves. You could place a structure like a base where the orcs and some small goblins could spawn. In the overworld a castle or a small house could appear where an ogre would appear. The goblins, if you give them an emerald, will give you a new map that will take you to a cave where diamonds are abundant. On the other hand, the orcs will be aggressive and will defend their treasures, which can vary depending on your luck. The ogres could give you a new mineral, which could be a ruby, but they will only give it to you if you kill them.In the ogres' house you can find many gold nuggets, but if the ogres see you and open their trunk, they will start beating you to death.