"Morning Glory" was essentially a maul with identical powers as a Sunsword, which would also glow when undead were present within 60' of the wielder. It was invented as an NPC weapon used by a priest of Lathander.
"Zulu" was an embarrasment to AD&D2 standards, but almost seems common fare to d20. It is essentially a +5 vorpal keen throwing returning distance longsword. The DM who gave him that weapon was on crack. If I had invented such a device, I would remove the vorpal tag and add this:
Once per week, Zulu's wielder can swear a vow of destruction against a hated foe. The wielder must pursue the sworn enemy above and beyond all other courses of action, save those actions that assist the wielder to pursue his chosen foe. The foe must be specific, and must first be seen by the wielder, but does not necessarily have to be known personally to the wielder. "The elven witch that lives in the Black Morass" is sufficient; "the ogre from the Skullcrusher tribe" is not, unless the wielder has a means of identifying a particular ogre. During a one week period, the sword gains the vorpal quality. If the foe is not destroyed within a week after the vow, the sword loses all powers for one full campaign month. Failure to slay a chosen foe a second time causes the sword to animate itself and attack the wielder until the wielder is beheaded. Once the sword takes the head of its former master, it is free to choose a new master.