Speak with Mina in Atlantis to upgrade your XP skill to LV2, then report to Mina.

Show Quest Info

Introduction

It's dangerous to wander the world with only your rookie level skills. You should to upgrade the skills you've learned. Mina in Atlantis knows how to upgrade your skills. Notice: Upgrading skills consumes EXP and Coins. The cost increases with each level. Think carefully before you upgrade!
Upgrade your XP skill to LV2 to finish the quest.

NPC Dialog

XP skill is destructive which usually can instantly kill all the monsters around you. However, alongside with your level-up, Lv1 XP skill can no longer kill the more powerful monsters in a second. So you have to ask Mina to upgrade the level of your XP skill.

Quest Completion

Lv2 XP skill will make you more powerful, go have a try.