undead vampire vegetables

in a comic i'm reading (called digger about a wombat) there's this one bit where there are these weirdo hyenas with metal helmets that look like kinda like birds heads. anyway so these hyena things are chasing digger (the wombat) for various reasons and they are really hard to defeat specially since they work for a dead (perhaps only bound) god which is underground (which is where digger discovered the god). ummmm so the some normal hyenas are trying to fend off the weird hyenas while digger and surka (a shrew that is also a professional troll) escape on some actual trolls (which are adorable i'd like to add). so the weird hyenas are chasing them and digger leads them into a field of...

drum roll (suspense slightly spoiled by the title)

... UNDEAD VAMPIRE VEGETABLES including squashes and pumpkins. and miraculously where an entire hyena pack failed the undead squashes succeed (in killing the weird hyenas i mean). why is this so? i mean it makes little enough sense already (it makes more sense when you've read the backstory) but they must be some pretty mean squashes to be able to kill the weird hyenas who work for a god and all. you know what i mean???

(probably not given how complicated the story is. bloody good comic though. www.diggercomic.com in case you want to check it out)