If a fighter has a +1 sword that only gives that plus one if he does an exhausting practice routine in the morning, he's liable to ditch the magic sword and just use an old fashioned chunk of steel. Rather than being wore out and need to rest a couple hours before he gets started just in case he needs that plus one, he could just strap on a blade and ride off without having to deal with all the issues. (From Something Agar said)
The Omen Star: In the West, in what appears to be an eccentric orbit, appears the Omen Star. The appearance of the Omen Star in the first house of the sky bodes "great things" for good or ill are about to happen. It is the rest of the stars that determine if it is for good and ill. Thus people are always looking for things to happen during the time of the Omen Star.
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.
Magic should have side effects, both expected and unexpected - fortuitous and deplorable. Expected side effects add anticipation, while unexpected ones increase the drama of the scene. The result can be comedic or dire, it dpends on which circumstances work best for your game.
Believable magic, like ordinary physicis, operates according to some invariable laws that always result in some kind of cost or "bounce back". The grater the magic, the more it should cost the character physically, emotionally, and spiritually.
"Binding the Life Coil" is an ancient quasi-mystical technique rediscovered to prolong one's life at the expense of one reproductive ability. It is a simple magikal technique that anyone can learn (a skill or feat). The promise of near immortality or a lifespan of a thousand years or more makes everyone want to learn it.
This technique has a price though, the amount of immortality is in direct response to the strength of ones reproductive spirit. Those that have never breed will live longer than those that have. The use of the technique makes conception difficult, if not impossible. So you trade the future of your society for the chance for you to see much of that future.
Nine times out of ten, it’s the undead that do the running.
Not strictly animal or vegetable, the Corpse bud is a peculiar individual that shares characteristics from multiple kingdoms and species. In appearance, all corpse buds bear a shape of a large rounded top bud divided into four lateral segments, and a much longer, narrower bottom bud, also divided into four segments. Between the two halves are a set of four radial limbs, rounded on top and flat on the bottom, covered with tiny serrated hooks facing towards the body. In overall size, it’s limbs reach as wide as a spread hand, with the body being as thick as a fist. It is as long as a human hand from top to bottom.
Internally, the top bud of the corpse bud contains a bacteria filled membrane that produces the hydrogen that the corpse bud uses to stay aloft, and a series of fungal gills for the dispersal of spores for reproduction. The lower half of the bud contains a number of fine filaments, as well as a sharp barbed stinger containing a powerful local anaesthesia.
The Corpse Bud mobilizes by inflating its top bud, and steers by rotating its arms rapidly about its body. The corpse bud ordinarily drifts with the wind, orienting towards the scent of recent decay and death. It preys on the recently dead, burrowing the lower bud into the victim, using the anaesthesia in case the victim is dying, and not truly deceased. Once embedded, it releases its filaments into the body, replacing the current nervous system. This gives it full animation of the body, and allows the corpse bud to direct it.
Corpse buds are not a malevolent species, being primarily concerned with breaking down the host body for food, and infecting the reproductive cycle with spores in order to mate with other corpse-bud bodies. To preserve the corpse for this purpose, Corpse buds will seek out dry locations to prevent bacteria from destroying the corpses. This often causes a large number of corpse buds to gather in a single location.
In culture, Corpse buds are used to repair broken spines or degenerative diseases, as the sentient mind will easily overcome the mind of the non-sentient corpse bud. Once infected by a corpse bud, however, removal is usually fatal, and the infected individual cannot reproduce, or risk infecting another. Thus, it is a technique often reserved for the elderly, or a last resort.
Necromancers and other dark sorcerers will often preserve the corpses of their victims magically, and infect them with corpse buds, creating traditional undead as well, so as to seed their lairs with undead both offensive and non, in order to throw their enemies off balance. They will also enslave the rudimentary minds of the corpse buds, and transform the docile things into a plague. There have also been accounts of magically transformed corpse buds with stronger minds and a taste for living flesh, but thus far all accounts are unproven rumors.