I dont remember where I got it, but I found a netbook of magic items, and it had some doozies in it. Some were rip-offs...the one ring, excalibur, the Shankara stones...a few were cool, like th Black Flag. When unfurled it caused any opponent who could see it to will save or flee.
But then there were things like the sword of cowardice...I still want to inflict that one a group. Basically, it was an intelligent, cowardly sword. Every time it was swung at a monster, it would scream in terror and try to twist its way out of their grip...
Then in 2E (possibly earlier editions too) there was the sovereign glue, and universal solvent. The solvent I suppose I could see, but super glue?