There are rare cats that can be born into the clan, ones that can see what others cant. Ones that can peer into the spirit realm with ease, often called marked ones by the others in the clan. They are looked down upon by normal cats and are said to be demons from the Lower Realm... Each marked one has his/her own unique power, often related to traits of said cat. The clan often exiles these cats as soon as they find out these powers, but no one knows where they disappear to.
Haha, sorry about that, it wouldn't let me put the full desc originally so ill just settle for this~