The real value is creating a much better Vampire Demon token when you satisfy the white and black devotion requirement
Each Draft Booster contains 15 Magic cards, 1 token or ad card, and 1 Helper card, with a combination of 1 Rare or Mythic Rare, 3 Uncommons, 10 Common cards, and 1 Eternal Night Full-Art Basic Land card
I hope the description helps you figure out this very familiar strategy.
Everyone came back with designs, but Richard Garfield was the one who evolved the idea the furthest
There are plenty of ways to get a card off the field and into your graveyard, and some methods are better than others
Even with the narrower effect than some other cards, having the option to do either when you need it is really good and easily outweighs any narrowness it does have