I think the Witch life state should open the sim up to all kinds of magic types, but not be required for magic itself. Human sims should still be able to be in tune with nature and magic, but their magic would only be able to be done in rituals and potions while Witches are free to do magic outside of those formats. The success of these rituals and potions should depend on their traits because the sim would need to be serious for it to work.
Supernatural sims should be a lot more secretive than they were in Sims 3. I liked the idea of vampires having a form they shifted into in the vampire pack, and I wish all life states had a similar type of form. Sims should not know that sim is supernatural unless they told them, the Perceptive trait is brought back and they have it, or if that sim changes into their true form.
Vampires would be largely the same, but more sim-like in their regular form. Even in their regular form, they will be slightly paler.
For Witches, their Supernatural form would usually just be into their robes and hat unless they're extremely good or evil. Really Good witches should glow a white aura around them, while bad witches should have green skin and an evil aura. In their regular forms, they should just look like regular sims. Even though a Witch must be a Teen to study magic, they can show signs of magic as children.
Werewolves should look a lot more wolf-like in their werewolf form, with a more canine face, sharp claws and toenails, and hair covering their face and entire body in their natural hair color. In their regular form, they should be hairier than the average sim.
Fairies would only have wings in their Fairy form along with skin tone differences like markings along their face and hands and a generally waxy and unnatural appearance. They should also have the distinction of being in either the Seelie (Light Fairy) or Unseelie (Dark Fairy) Courts. In their regular form, their skin should look more perfect than average regardless of their age.
All Supernatural sims will shift into their true forms at a Supernatural Hangout or before feeding, if applicable. (Except for werewolves, who will turn during the full moon along with at a Supernatural Hangout)
Spirit Boards (Generic name for Ouija Boards) can be used by all sims child and older, but will vary in success depending on the Sim's traits and whether or not there is more than one sim using it. The results will be a lot more negative if only one sim is using it or there's a sim with a negative mood using it to the point that they can actually become possessed. (To keep the game rated T, that sim will just yell, wet themselves, throw things, float around, and insult every sim on the lot until the spirit leaves the body) Having at least one supernatural sim using the board will increase the chances something happens, but Young Adult Witches and older will outright refuse to use the board just like Supernatural Skeptics would. Teen Witches will increase something happening, but it will almost always be negative regardless of their alignment and personality. Child Witches can use the board as well, but they'll be so scared from what older witches have told them about their powers attracting evil spirits that they'd ask the other players to end the session early before anything is able to happen.
Sims should be able to go ghost hunting both with professional equipment (night vision camera, EVP recorder, etc) and unprofessional equipment (cell phone apps). They should have varying amounts of success with both video and voice recordings they can look over afterwards. Their chance of success will increase if they are around supernatural sims.
