For reals? So, what, the only snacks and drinks he can have on game night is blood?I would certainly allow it, but you would also be a Vampire for reals. Sounds like fun.
Old School Wish fulfillment, right hereNo problem. As you speak your wish, you are teleported to a handy rack in Strahd's basement. A few nibbles later you're a full-fledged vampire spawn, bound to his whim.
"I wish this wish won't be granted."If forced to Wish,
One of the old Wizards Three articles with Elminster, Mordenkainen, and Dalamar mentions that any Archmage worth their salt made their first Wish to be "Immunity to Wish.""I wish this wish won't be granted."