You will receive an item called :

For Sung Jin Woo V1
(You have to use Sung Jin Woo v1 for the quest line)

x1 Venom Fang
x1 Knight
x1 Book of Technique

For Sung Jin Woo V2 or its call Demon Lord's Dual Dagger
x2 Demon Lord’s Dagger
x15 Demon Lord’s Soul

Obtainment Method: Obtained from Demon Lord's Dual Dagger by completing the quest after giving him 2 Demon Lord’s Dagger, 15 Demon Lord’s Soul, while being Diamond Rank or Higher.
Location: Starter Island

***If you want the item instantly, please DM me first to see if I’m online. Otherwise, you might need to wait 6–7 hours since I could be asleep***

If you have any question feel free to dm me! (≧ω≦)

***Price can be discussed***