They are fun, you find the items to start them when you kill the monsters in Beastmen Strongholds, Like palborough mines for instance. Then you give that item to one of the OP guards, you are then capped and must face 3 waves of mobs, with an NM at the end...for the OP in North Gusta you Face Lead Quadav at the end...they drop all kinds of items based upon how many NPCs are left alive....I got mannequinn boots^^ we also found garrison armor and dragon chronicles pages....plus1k gil for each person...it was really fun....PS...use a full alliance for NG u are capped to lvl 20(we had 6whm some Nins some BST a rng or two and some vokers[lots of voker])