Well according to the Guide i was reading to get to the Nymph Master:
How to get
1.Go to East Dungeon and find "Nymph Master" at Plain Forest. You have to take "Jade" with you. Go to a hole at South-west of map and go in. If you not have jade , you will be warp to another map). Give Jade and Miracle Chrisalid to Nymph Master.