Undead

There are many types of undead, but in general, they can be described as immortal beings that began their existence as mortals. There are a lot of ways this could happen, from a spell or curse to a transmitting bite, but all these methods have magic in their base, so all undead are magical, even if they weren’t born that way.
Popular culture seems to suggest that there are numerous undead, but in truth there are very few of them and they tend to be very reluctant to create more. Not because of the common belief that undead become evil or soulless (most of them find that notion hilarious), but because mistakes can bring tragic results and because immortality is always unnatural and can have odd and dangerous side-effects.