One of two ---> means one of two ghosts. If Crowley's hellhound was white, I would totally be on this clue to accept it. As it is, I choose to neither pass or deny this. "One of two ghosts" to me would imply two of the same kind. As in twins, two healers, two leaders, etc.
Cold house Basin reference = pass
Darkness = color ref, pass
Shadowed wings, I am still not sure on. I think that this clue was misleading, and at the very least, I cannot pinpoint how wings and shadowing are related to his magic. Even the wing of a house doesn't necessarily point to magic.
Overall, I have to fail this stealth. I think alot of the elements were really good but required a little more clarification for it to be considered a fair stealth.