User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-98.113.182.208-20120515042306/@comment-3481504-20120515233723

No, no, no. Cas said it wasn't meant for angels, and most (but not all) can't read it. Archangels can, probably.

However, yeah that makes sense...Metatron being older than Leviathans. Which makes Death wrong...again.