Not sure if this has been mentioned in one of these threads before, but the -2 sword being awesome will always be a favorite of mine.

Quote Originally Posted by SRD
After one week in a character’s possession, the sword always forces that character to employ it rather than another weapon. The sword’s owner automatically draws it and fights with it even when she meant to draw or ready some other weapon. The sword can be gotten rid of only by means of limited wish, wish, or miracle.
So we have a weapon that automatically teleports to your hand from other planes of existence and can survive being used against an Umbral Blot. Even Disjunction can’t get rid of it because of the specifics of the weapon. Getting it Sundered would be getting rid of it, disintegration would be getting rid of it, loosing it on another plane of existence would be getting rid of it. And because it forces you to use it then it basically has to just teleport to your hand when you draw a weapon. Sure you get -2 to attack rolls but that’s manageable