Angel Eyes
From Super-wiki
Angel Eyes are the eyes of an Angel.
9.10 Road Trip
Gadreel shows his eyes upon returning to his first vessel.
11.09 O Brother Where Art Thou?
Lucifer shows his eyes during his return.
12.19 The Future
Castiel shows his eyes while being empowered by Lucifer's unborn son.
=14.10 Nihilism
Michael menacingly shows his eyes.