20Anti-Possession Tattoo and Angel Rib-Carvings
In season five, Dean and Sam also got special angel sigils carved onto their ribs.
To be fair, this one does feel like a freebie. Even the most casual viewer of Supernatural knows what the anti-possession tattoo looks like. Resting on his chest, the anti-possession tattoo makes sure that demons cannot possess his body.
Dean and Sam both acquired anti-possession charms at the end of “Born
Under A Bad Sign”, which they later got tattooed.
Post-Hell, the tattoo had vanished and Dean needed to get it reapplied, though we don’t know exactly when that happened.
Thanks to Castiel, Angels could not find their physical bodies. Though since then, angels have definitely gotten around that.