HoraK got quite cool idea and I absolutely like it (he already staged MR).
Friday 13 is coming, so are black cats, just like they usually do. This year, however, I recommend to be on server around Fri 13, because rumors say there will be unusually many black cats. While bad cats said to bring bad luck, perhaps its just some prejudice? Or maybe there's some balance and if ppl have bad luck, someone could also enjoy luck as well?
Hint: it will be based on existing Fri 13 handling, but a lot more cats will be around, so chances someone gets rare dragon shield are considerably higher. This also needs server update, though there are more reasons to go for updates anyway - since it would also bring e.g. new MMO battle and so on.
So come to the server at Fri 13 and hang around, searching for black cats. Perhaps someone will be lucky enough to get Dragon Shield?!