“ Diseased people, (leprosy or any other such fear inducing disease) when traveling, will often times wear a cloak that entirely covers their body and ring a bell as they travel, used as a warning for any others to stay away. Could be used for a disguise or safe passage.”
“ Animals have parasites and diseases, so do plants, there are even bacteria that cann dissolve oil spills or plastic or what have you - why couldn't there be a disease living off magic - a magic item could be infected, losing power and speading the plague to other equipment it contacts, while a magic user would slowly lose his powers and contaminate all he works with or casts a spell at...”
“ The Single creature game> Where there is only one type of Creature to fight other than humans
Werewolf> This is one I've worked on a little>there would be one common one and then regional variation
Gnoll> racial differences like humans only a little more severe.
Dragon> you could make them more common and w a lot of younger ones”