Vampire blade seems cool it has a good benefit but it also has a possible sacrifice when using it. It also dosn't seem to overpowerd to me but I'm still a little new to the game.
Alien artwork seems like a good idea but it seems that it might be better as like a wall rubbing or something. More primitive but still a great idea.
I am still a little new so I don't no anything about the aquatic areas yet they may be in an expansion I haven't yet seen. So I can't say anything about the boat idea.
I like the idea of a supernatrual ally but wouldn't it be cool to have the other one join you as well because you know in the show they are usally together and stuff it just seems if you get one you should get the other as an ally too. And his brother could give you a +1Lore bonus. I also think supernatrual is cool too. I'm surprised somone hasn't done a whole expansion with the show adding new items allies and unique items based of the show.
Great stuff.