Castle Ravenloft is decent for vampire decks, and a must-include for those that lean into blood tokens (aka, perfect for Strefan/Strahd)
Dead Weight is just, straight up, awesome
And don't forget it still enters tapped!) If a card with eternalize is put into your graveyard during your main phase, you'll have priority immediately afterward
Pair it with Faithless Looting or Bag of Holding to make every discard count, and soon youll be sitting on a mountain of mana and mischief
Once you have the four cards that you needed in your Questbook, show the cards and your book to a Cast Member at the Illumineers Lounge in the Morocco Pavilion or in the Odyssey, and they will stamp / punch your card
In other words, if your opponent removes it right away, the fail-case is pretty mediocre Obviously, this sets up the first counter on its own, and once you transform this you get a pretty absurd land