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They can be feisty little guys. And impossible to house train. Once they start nesting, forget...

Grimslaw demon was a dangerous species of demon that fed on human hearts.


Anya Jenkins summoned one of these demons in order to grant a wish to Rachel, who had been humiliated by a group of fratboys. They made her feel she was having her heart torn out, so Anya made so they felt it too by summoning a demon to ate their hearts.

The Grimslaw did not leave the frat house, instead remained inside with Rachel until Willow Rosenberg scared it off. It then fled to a nearby woods, where it killed another human. Buffy Summers and Alexander Harris attempted to hunt it. Though it pounced on Buffy, she was able to throw it off before it retreated back into trees, where Buffy killed it by chucking an axe.[1]


Grimslaw demons had a long, dark green body that was roughly the same size as an average human. They had spiked carapaces and possessed six legs, four of them elongated for crawling and the other smaller two closer to the abdomen, each possessing small pincers.

Their heads also had several large mandibles and appendages. A long mouth extended from the Grimslaw underside, with teeth for drilling and eating.[1]

Powers and abilities[]

Buffy fights a Grimslaw demon.

Grimslaw demons possessed several common abilities associated with spiders, such as wall climbing and the ability to produce thick black webs. They also could leap great distances and pounce themselves on humans and overpower them, including Slayers to some extent, though couldn't penetrate a magic force field created by Willow.

Their most potent weapon was a secondary mouth located on the bottom of its abdomen, with four large teeth. This was presumably how it ate human hearts, by pouncing on the victim and biting the heart out.

Grimslaw demons were especially dangerous, as one slaughtered an entire frat house of adult males in one night.

Halfrek implied that Grimslaw demons were possible to house train, though difficult due to their nesting habits.[1]

Behind the scenes[]

Artist rendering.

  • The Grimslaw demon was both a CGI effect as well as a prop. This could be seen when Willow flung it out a window and after it died.