Greyfell is a divine horse that can rise from its ashes like a phoenix.
Every day, if it's not immortal, it loses health.
If it has survived at least 30 days since its last birth or rebirth, you receive 2 diamonds and 20 000 equus when you send it to Heaven.
You can bring it back to life with Pandora's Box or revitalize it with Black Orchids.
There are 12 different Greyfell, 2 of which are female.
Only once during the game, on the 1st of a month, if you have at least one of each that's still alive, you can transform one into a Palomino Sleipnir on its profile page.
Females can reproduce once with a Greyfell male, giving birth to another Greyfell.