Another oddity uncovered: The Demon-Quelling Sword is statted out as a large +3 evil-outsider-bane frost mighty-cleaving bastard sword. Now, that exceeds the +5 bonus limitation on non-epic weapons, but perhaps this is just an instance of dropping an epic-level weapon into players' hands way before they should get one (the exact sort of thing we recently got a "Save My Game" article about).
It's also described as if medium-sized non-proficient characters could wield it, which they couldn't. If you're not proficient with the bastard sword, it's treated as a two-hander, and medium-sized creature can't wield a large-sized two-hander.
And to top it all off, it's not listed as intelligent in its description, but during a later encounter it provides the party with information about opening portals (apparently it's evil).
Another noteworthy and questionable issue to its inclusion is that even taking into account the challenges most characters would have to overcome in order to wield it, it remains a far better weapon than Thaas, which is supposed to be a bigger-deal weapon. The mission to get the sword is basically a side quest.
It's also described as if medium-sized non-proficient characters could wield it, which they couldn't. If you're not proficient with the bastard sword, it's treated as a two-hander, and medium-sized creature can't wield a large-sized two-hander.
And to top it all off, it's not listed as intelligent in its description, but during a later encounter it provides the party with information about opening portals (apparently it's evil).
Another noteworthy and questionable issue to its inclusion is that even taking into account the challenges most characters would have to overcome in order to wield it, it remains a far better weapon than Thaas, which is supposed to be a bigger-deal weapon. The mission to get the sword is basically a side quest.