Yes, Not all of them.
You just need to add more than one ore in one biome.
What I mean is that when you complete the diggo mission, you should immediately have additional Xp, but that is not what happens. Rather, XP are taken after cutting down a tree, breaking a stone, or something similar.
It's nice to have variety in the game, so add Tin ore, which is stronger than stone and weaker than copper.
When Deggo covers you XP, take it until you defeat the next thing.
Some chickens do not lay eggs.
