Why is most magic used for evil? Well, because...
Often PCs get on the wrong side of powerful users of magic or break into enchanted tombs, either may get them on the wrong side of a curse.
Many roleplays are set in a world where much of the land is held by barons and other nobles serving under the King or Queen. Sometimes the PCs may need to meet these nobles to ask for help in their Quest, at other times they may be caught for breaking the law and end up with their lives in his hands. Yet nobles are different;some may be good people who care for those underneath them and are loved in return, others may be unpleasent tyrantts hated and feared by their underlings, and still others a bit of both. With this in mind I present thirty nobles
The PCs find a small green glass bottle, something can be seen writhing within the smoked glass. If the PCs open the bottle a repulsing form of life will pour forth and grow in size. A genderless beings of soft pliable purple flesh towers before the PCs, it has no detail, no distinguishing characteristics except for a narrow slit for a mouth that holds rows of inwardly curving teeth.