I originally intended for players to earn the hidden legendary levels (beyond 60) by completing plots, but I had players kill the dungeon bosses for simplicity. In other words, the boss gives the key to proceed to the next dungeon, but that doesn't necessarily have to be the same as earning the "special" requirement for items. I haven't looked at those particular scripts in some time, but I believe the framework is still there for more complex requirements than simply killing the boss. I'll give the idea some thought.