Golden Wolverine
From Record Of Fantasy Adventure Venture
A wolverine with eight legs and a golden hide. The hide is not entirely made of gold, but enough of it is so that it is completely immune to lightning bolts.
The Byzantine Envoys encountered one on the border of Polotsk and Novgorod.
The beseigers of Novgorod also used them to good effect by bundling them up and throwing them into the city. Needless to say, a golden wolverine who's been captured and tossed over a city wall will emerge in a very bad mood.