The angel banishing sigil, once drawn in human or angel blood and a hand pressed at its center, sends out a fierce light that banishes any angels within its blast radius. This sigil does no harm to the angels, it merely sends them to a different location on earth, their vessels included. It also doesn't harm the vessels they occupy. This is, in a way, a weakness for the angels. Once the sigil is activated, the angel it is affecting, temporarily has its grace inactive, so that it is rendered mortal. As a result, it cannot fly back to where he or she was banished. They cannot stop it, once in use. It can be activated by both humans and angels (in human vessels); it does not banish the angel that activated it, unless the sigil was carved into his or her vessel's own flesh.
- Season 4
- Season 5
- Season 6
- Season 7
- Season 9
This spell was first demonstrated to the Winchester brothers by Anna in the season 4 episode Heaven and Hell. Dean later watched Castiel draw it on the wall in the Green Room to banish Zachariah. When Zachariah comes for him in the episode Sympathy for the Devil, Dean reveals to have drawn it on a sliding door and promptly sends Zachariah away using the sigil. He claims to have learned it from Castiel.
Afterward, both Sam and Dean use the knowledge on how to make the sigil to defend themselves against both hostile and unwanted angels.
- Anna Milton was the first to show Sam and Dean this sigil. Ironically, they would later use it against Anna herself in The Song Remains the Same.
- In some of the symbol's later appearances, the sigil had less intricate designs, but were shown to be just as effective.
- So far they have used it at least once every season except seasons 8 and 10 since it was introduced.