The Mighty Hammer 'Grond' (+25, 40d40) [+10]
+2 to attacks. A hit from this weapon can cause an earthquake. It
modifies damage: x1.5 vs. evil, x1.7 vs. animals, x2 vs. undead, x2 vs.
demons, x2 vs. humanoids, x2 vs. people, x2 vs. faeries and x3.5 vs.
dragons. It gives its wielder telepathy and see invisible. it burdens its
wielder with aggravation. It is vulnerable to damage by disenchantment.

(EyAngband 0.5.2)