Ancient Clue

Exploration Stage: Moon Gate
From: Detective
Description: My gut tells me we're one step away from the solution. To understand why the monster was able to scramble through the Moon Gate using the invitation sent to the princesses' parents, we need to find an important clue. Help me inspect the area where the ancient helmet was. Don't be surprised, buddy, but we're looking for blood.
Completed: We found exactly what we needed - a blood sample! It's pertified, but it's good enough to check my theory. I'll take it to Martha.