“ The PC's end up in a strange world where the very rocks are made of gold and jewels.As such gold and jewels is worth very little, but the iron in their swords and belt buckles is suddenly worth a LOT.”
“ Thrown enchanted skulls make great necromantic 'grenades' releasing blasts of negative energy, incorporeal undead, swarms of flesh-eating worms, etc.”
“ 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”