The best way to describe these creatures, 3 legged chicken/monkey/squirrels. These animals are proof that Gods have senses of humor.
These are also known as sourges of the desert sands. Carvitons bare a strong resemblance to their water dwelling cousins, including the large dorsal fin that can be seen in the sands.
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.