28- Twin Lotus
Tales are leaking from below the Iron Hills, that an unnamed winged terror can be seen on the sky on the darkest of nights. What creature it is, nobody knows, but some of the disappearances in the harsh place are said to be its work. If the moon is hidden, nightly travellers are warned to stay from roads and open places.
The most guarded secret of the Ancients, was the secret of flight.
A PC Conjurer or summoner, basically any mage whose sole purpose in life is summoning creatures to aid in battles and various situations, is cursed with a hex, and needs to find a way to undo the curse...before he goes mad, or his fellow PCs throw him out of the party, or worse.
Everything he/she summons, never goes away. So you'll have to figure out what the heck to do with that dire bear or fire elemental once it's done fighting the orcs for you. Eventually a caravan of bizarre creatures either annoyingly ends up following the summoner around, or they go off to cause mayhem elsewhere. Bad news for the poor spell-caster regardless.