“ In a new town for the first time, the White Raccoon Lodge looks like a comfortable place to spend the night. The owner, however, makes sure to explain to you that there is a curfew after sundown and the door will be locked... from the outside. 'We don't want anyone being caught out on the streets after dark,' he says.
Now that you think of it, all the doors in this small town did have a crossbar on the outside rather than the inside... You wonder what goes on at night...”
“ Arkths or Ravagers: These are large landbound crablike creatures about the size of Grizzly Bears. They live partially in the astreal plane. Their food is magic. They can sense it at huge distances. Since spells and such are hard to eat (being in motion) and magical places are the equivalent of a sea of krill to them, they are looking for magic stashed in concrete places. Their primary food source is magic items, alchemical potions, and enchantments. They do a pretty good job of mangling/ eating the physical aspect of said items in the process of chowing down. These things will be the bane of dungeons everywhere, as they will slowly eat away much of the treasure (and the magical traps... so it can be advantagous to follow these things). Note: They will attack people with highly magical natures (i.e. high magic powers). They will probably kill the person in the process of sucking out the power.”
“ If you want to add a 'supernatural' touch to your campaign, define the rules of magic and the universe. Make your players comfortable with those rules. Then your new supernatural creatures must then break those rules.”