At least werecrocodiles look reasonably respectable to lose to. I lost a fort to werekoalas once. Missed one dude that got bitten in the initial attack before my military eviscerated the interloper. Next full moon everyone was chilling in the tavern and he managed to bite about fourteen more before being killed. Subsequent full moon ended the fort.

Still, had a laugh about it. More fun than enthralling fog, or rains of elven blood that stop anyone caught in it from ever being happy again.