Kinda messed up. Mc has a weak appraisal skill and is used as a pack rat. He is abandoned by his party in a dungeon after they discover a hidden dungeon with s rank monsters. He falls over a cliff and finds yggdrisil that heals him and grants him powers. His appraisal skill upgrades to a skill copy skill
The Unfavorable Job [Appraiser] is Actually the Strongest