Sundermaul

Sundermaul +3 is found in one of the two chests in Vampire Hideout in Bloodbark Grove.

In-game description
"Legends speak of a hammer with the power of the gods themselves called Crom Faeyr. A smith once forged an inferior hammer and claimed it Crom Faeyr. Such was the retribution of the gods that ever since, when the name "Crom Faeyr" is uttered, the very earth beneath the wielder's feet may rip and tear asunder, threatening to bury the blasphemer and any who happen to be standing nearby."