When you finally unlock the dungeons or bosses at the level they require you to get. You can't even come close to beating anything unless being carried. This leads to the entire game being dead content, because you can't play what you've unlocked. Almost as if they don't play their own game. It takes literally years of farming in game currency just to level your skills up. They've actually made it harder for you by charging you each level. One of the greediest game layouts I've ever seen.