Changelings use the pulverized bones of fallen Gumm-Gumms to help them shed their human forms and embrace their trollish natures.
In "Bad Coffee", Stricklander gives Jim a handful of the sand to help him hone his feral instincts and become more stronger. It briefly worked, until Blinky intervenes after hearing a bunch of rackets. Jim nearly loses himself to his feral state, until Blinky manages to help him break free and find himself again (while in the process, his voice is permanently altered).
Strickler then gives Jim his can of Gravesand just in case Gunmar decides to strike. However, at school, Jim accidentally loses the can as it ends up in the teacher's lounge and he ends up grabbing the wrong can. the staff members then unintentionally consume the Gravesand, becoming more troll-like and begin harassing their students. Jim, Toby, Steve, and Eli manage to get the kids out of the school before they discover that Strickler, too, has been fed Gravesand.
Luckily, the boys manage to emotionally connect with each of their teachers (former and all) and free them from their feral curses.
Gravesand takes the appearance of black-and-purple dust.
It helps Changelings shed their human skins and embrace their trollish nature. For humans, it hones their feral instincts, making them as aggressive and violent as Trolls.
Gravesand changes the human's nature, turning their eyes to yellow and their irises red.
If Gravesand is consumed, it boosts the effect tenfold. Also, changes from the Gravesand become permanent unless the victim achieves an emotional connection with their human feelings.
|Appearances in the Trilogy|
- This is what changed Jim's voice when he was replaced with Emile Hirsch, making him sound like the Gravesand permanently transformed/damaged Jim's vocal cords.