Level 124 - The Child Prodigy

Requirements:

• Level: 124
• Quests: Tier 5 Rank-up
• You must be in a Party

Description:
Go to Cursed Odesses in Lost Temple (105).
Cursed Odesses wants you and your party to kill 20 of Xetan and Igolation's shadow clones in less than 60 minutes in Endless Tower 3(124). 

Once your party has finished the task, you may return to Cursed Odesses again to claim your reward. Which is 15.000.000.000 (15 bil) EXP for every party member.