I think this is a bit unfair. People are now developing a market around mods due to the severe rarity of even simple mods. Yet, when one crafter managed to get his hands on a mod and reverse engineer it, he'll only get around mastering iit by measly 4%. Yep, we're paying at least 5000 marks for 4% progression on mastering that mod. That means I'm gonna need to spend at least 125,000 marks to master one type of mod if we get it all by puchase. We're not even ssure if the next mod I get will be tthe same as the last one. And I'm talking aabout a simple mod here. Imagine the investment needed to get and master complex mods and above. Really, the lessons are not worth it at all, I wish I could just take it back like I could with class abilities.