There are 4 orbs so far in Servants of God:
Orange:
Effect: Gives heat resistance
Found: After the Side Quest from Mahboob
Blood Orb:
Effect: Rasies Max Health
Found: Top Floor of Crypt #1
Yellow Orb:
Effect: Increases PsP gain in Battle
Found: First Light Room in the Hidden Corridor (use mouse to find) in Crypt #2
Violet Orb:
Effect: Increases Max PsP
Found: Top floor of Crypt #2