My Mistborn character, Cxxn (pronounced Sickson) has a Mistwraith. It's important because a lot of his childhood memories are of his dog, Rafael, and he can only really access them through his dog. However, his dog died in the mists 5 years ago and that's when he snapped. (He burns copper, but thats not super important right now). Much like how amnesia works, he has trauma, sort of like PTSD, and only remembers his childhood when he is reminded of his dog. (This is exaggerated, he doesn't really have a magical connection to it, more like a sentiment) the thing is, he sees his dog again. Thinking it's a kandra, he pulls out his knife, ready to defend himself. But the puppy's skin retracts, and he sees that it is a Mistwraith. However it is no normal mistwraith. It is sentient, but not fully sentient.
Hemalurgic spikes decay and lose some of their power when out of a body, keep that in mind
the mistwraith, which took over the body of the dog shortly after it died (Five years ago), had just recently picked up a mysterious blessing spike.(Yes, just laying around in the mists.) But no normal blessing spike. It was laying around, and was decaying. However, the Mistwraith was brought into self awareness, and was able to find it's first corpse, Rafael, the dog. He took form of it, and stuck with that set of bones. He follows my character, Cxxn, around.
And yes, his name is Wraithael (lol)
He is basically a half kandra, half mistwraith.
Tell me Brandon, does this work?