The Shadow Dragon NPC is located in a shop in south Buya. It is here that players can choose to do what is called "selling experience."
In doing this, players may exchange experience earned from hunting and quests in return for stats like Vitality, Mana, Will, Might, and Grace.
Selling experience may not be performed until after the ?? insight, and is not reccommended until after reaching the 99th insight since it will increase your TNL (or to next level, the experience required to gain your next insight).