The Bastard Sword 'Calris' (5d4) (-20,+20)
It increases your constitution by 5. It slays trolls, demons, and all evil creatures, and it is especially deadly against dragons. It provides resistance to disenchantment. It aggravates creatures around you and is heavily cursed. It cannot be harmed by the elements. It gives you one attack per turn.
Level 30, Rarity 15, 14.0 lbs, 100000 AU

(NPPangband 0.5.0-WIP8a)