Possible Clues:

• Reverting to older form of Greek without classical name for bird
• Involving reversion to an earlier type
• Of throwbacks
• Reverting to the ancient Bible — one's in Greek
• Reverting to an ancestral form
• Destroyer coming back into room, showing more primitive characteristics
• Reverting to something ancient
• Hindu deity back in loft reverting to ancestral traits
• Like a remote ancestor or throwback