Talk:Magic Craftsman/@comment-27033694-20160622140140/@comment-50.69.235.186-20170621060008

But runes weren't actually a crafting thing in YGGDRASIL, they were only a skin that Players could get from the cash shop. The sword that Ainz shows to Gondo and the others with 20 runes on it was crafted with regular means but equipped with a run skin for style.

So either the Magic Craftsman was able to learn runecrafting from another dwarf and used his insane Player mana reserves to be super best at it, or he was just an exceptional dwarf and not a Player.