en Lu Kong directly used the remaining skill stones to upgrade all his skills.At least he left behind quite a few skill stones.There are quite a few Minor Skill Stones and Beginner Skill Stones, but u...vel finally increased again, reaching level 20!Level 20 is a threshold for current land and air forces.First, Lu Kong had obtained a level 20 accessory, [Pale Bone Finger], from Harper before.Pale Bon...