Crypt of Resting Thoughts is an end game grind zone. To grind here you need 380dp plus with 300ap  Kutum at least to survive and kill the mobs. Crypt mobs are primarily grinded for two things money, and the costume pieces. Money per hour here is really good even without rare drops. The La Orzeca Outfit is a new outfit that can only be obtained by grinding and obtaining a lung. Once the lung has been gained you can turn it into an NPC in exchange for one of the costume pieces. Olun's drops the left lung and the right lung. If you cannot obtain a lung drop you can also get black and red leaf's. Once 100 leaf's have been obtained you can use them on obtaining a costume piece as well.