|Dates||???? - 2018 (killed by Gabriel)|
|Episode(s)||13.20 Unfinished Business|
Despite his age, Sleipnir does not appear to be particularly powerful. In a fight with Dean, after Dean disarms him, he is easily thrown to the ground. His real form is a horse, as his occasionally-glimpsed "demigod face" shows.
- Silver - A silver bullet to the right shoulder was able to wound Sleipnir.
- Specially-crafted wooden sword - A specially-crafted wooden sword through the heart was able to kill Sleipnir.