The Morning Star 'Bloodspike' (2d6) (+8,+22)
+4 strength. Slays animals, orcs, trolls. Branded with venom. Provides resistance to nexus. Cannot be harmed by acid, electricity, fire, cold. Grants the ability to see invisible things.
Min Level 20, Max Level 75, Generation chance 3, 15.0 lbs

(Angband 3.1.2v2)