Use the Crystal of Stealth to sneak into the Serra Camp. Remember to use the Serra Teleport Array to enter the camp. Once there, find the Serra Tribe Classic II and take it to Horus. The Serra Tribe Wizard might be holding it for safekeeping.
Tip: after you get the Serra Tribe Classic II, you can use theSerra Teleport Array to leave quickly

Show Quest Info

Introduction

You need to sneak into the Serra Camp again and find the Serra Tribe Classic II. The Serra Tribe Wizard may be holding it for safekeeping. Be careful. Use the Crystal of Stealth to sneak into Serra Tribe a second time.
Notice: Crystal of Stealth is only effective for 2 minutes.

NPC Dialog

Unfortunately, we still need more information, so
you will have to sneak in there again. Take another
Crystal of Stealth, and search more thoroughly this
time. Be careful!

Quest Completion

Amazing! Haha, I knew you were worthy when you
passed the judgment of the Gold Libra. Let me see
if this volume has the information we need.