Demonbane

Weapon (longsword) item, artifact (requires attunement by a fighter or paladin of lawful alignment)

Demonbane was forged with one purpose in mind, to kill demons and specifically Orcus. Strangely, Demonbane was created not by paladins or clerics of Law, but rather by the arch-devil Baalzebul, who proposed to overthrow the Lord of the Undead. Because the arch-devil did not particularly care who used the sword against Orcus, he made it neutral, rather than evil.

You have a +3 bonus to attack and damage rolls with this weapon.

• Spellcasting. Demonbane can cast the following spells without material components:
• detect evil and good (at will), enhance ability (once per day), holy aura (once per day).

Protection from demons. While wielding Demonbane you gain a +2 bonus on all saves against attacks from demons, and are immune to the Wand of Orcus.

Devil’s friend. If used against a minion or ally of Baalzebul, the sword becomes powerless and non-magical for 24 hours.

Sentience. Demonbane is a lawful neutral weapon with an Intelligence of 14, a Wisdom of 18, and a Charisma of 19. It knows where Orcus is and guides you telepathically by letting you know if you are getting closer or further away from the Demon Prince.

Personality. Once attuned to you, the sword urges you toward destroying Orcus. If you do not proceed directly toward Orcus, Demonbane asks to be handed over to a more dedicated warrior. If this fails, it attempts to dominate you (DC 18 Wisdom saving throw to resist). If dominated, you follow Demonbane’s directions. You are allowed a saving throw to break free of Demonbane’s control after every long rest.

Destruction. The sword melts into gold upon delivering the killing blow to Orcus; otherwise, there is no way to destroy Demonbane.