watch 02:21 The Loop (Games) Do you like this video? Thunderjaw Heart is a rare resource in Horizon Zero Dawn. This rare machine resource is only found on Thunderjaws. Buying This resource is needed to buy the following items. Weapons Tearblaster (1 Heart / 2 Hearts) Adept War BowNG+ (1 Heart / 2 Hearts) Associated Quests Healer's Oath (1 Heart) Retrieved from "https://horizonzerodawn.fandom.com/wiki/Thunderjaw_Heart?oldid=44238" Categories: Machine Parts Hearts Community content is available under CC-BY-SA unless otherwise noted.