#119 - Now Leaving Kellwood - in A Cabin In The Woods
Typically an old man like John Marlowe would be kicking back and retired at this point while his kid takes over the monster hunting business. I think we've seen that Robert Marlowe doesn't have the temperament for that kind of thing, let alone magic powers. Vic on the other hand has something going on with him... both a family inheritance from John's side of the family, and whatever the heck is going on with his mother's side of the family.
Vic isn't going to drop dead if John stays, but if he loses all of his "Ixian" essence (it's signified by all the blue) then the Ixzerite essence will dominate him and he'll probably turn into someone like his Karen mother but with heretofore unknown magic powers.
Blaine sees this situation as being like if Superman just told his pal Jimmy Olsen that protecting Metropolis is up to him now, 'cuz he's gotta go into outerspace for a bit. Of course there's other superheroes here but he's not friends with any of them!