watch 02:27 The Loop (Games) Do you like this video? When striking a hard surface, a thunderstone creates a deafening bang. Any target who fails a fortitude save will be deaf for 5 rounds. All creatures in a medium (3.33 meter radius) area are affected, except friends (after accounting for the PvP setting). The difficulty class of the save is 15. Notes Edit Introduced in the expansion packs. Custom content notesEdit script: X0_S3_thunder Retrieved from "https://nwn.fandom.com/wiki/Thunderstone?oldid=66878" Categories: Grenade-like weapons Item powers Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.