Hidden jewel5 times repeatable

Level 36 - Hidden jewel5 times repeatable
NPC Donwhang Harahohunter guild
First time Kill Black Robber Archer’s to obtain 100 expensive jewels
Second time Kill Black Robber Archer’s to obtain 100 expensive jewels
Third time Kill Black Robber Archer’s to obtain 100 expensive jewels
Forth time Kill Black Robber Archer’s to obtain 100 expensive jewels
Fifth time Kill Kill Black Robber Archer’s to obtain 100 expensive jewels
Reward Reward 537000 exp, 50000 SP exp, 94000 gold
Link Leegeuks Jewel
http://www.gamefaqs.com/computer/doswin/file/930711/42392