Ring of the Cats
by Roger LV Girtman III don't know the history of the Ring of Cats, as it appeared in one of my Dad's campaigns many years ago. It was last known to be in the possession of a paladin from Thyatis by the name of Lord Jestron, as a gift from King Dirk the Defender of Soderfjord (the character, in this campaign, was established as uniting the Jarldoms before Ragnar was credited with it.)
The Ring, had the ability to absolutely control all (non-sentient) felines for an indeterminate period of time.
The drawback was that each night, at midnight, regardless of where the wearer is (on a small sailing vessel in the middle of the Sea of Dread), a random encounter of Great Cats will accost the wearer and allies, without regard to morale.
The ring itself is not cursed, but there is a curse applied to the wearer, so that the ring cannot be removed. At the last known location of Jestron, somewhere in the Wyrmsteeth mountains, his army (the party was 8-12 regular players, with 2-5 characters each, most with hirelings and retainers [my dad was the single most awesome DM ever]) was searching for the fang of a Red Dragon, willingly offered, to remove this unfortunate side-effect.
When my dad stoped gaming, this adventure was still on-going, and Jestron was a 32nd-lvl Paladin. My own characters were a 12th Lvl thief named "Thud" (a nickname which stuck since 1st level, after a critical failure on a Move Silent check) and an 18th Lvl M-U called simply, Psycho--his real name was unknown. (AL: CN; 18 Int, 3 Wis--he really was quite nameworthy).
(Man, this is making me nostalgic for my dad's old games. I'm going to have to call him and ask what the storyline was supposed to have been.)