One way to keep your vampire army alive (provided it's not a 1/1 or a token) is to have Dusk Legion Sergeant on the board
There are also a wide range of helpful Artifacts, including Equipment, Vehicles, or just general support ones like Lunatic Pandora which can be used to destroy one of your opponent's cards
1 Card of any rarity is Traditional Foil A Collector Booster contains: 15 Magic: The Gathering cards includes 812 Traditional Foil cards
It's an incredible pump effect, and because it's attached to a creature and not an Instant or Sorcery, you can find it using green's excellent tutor effects
If you've never seen the card in action and are interested in playing dinosaurs, sleeve this up, and you won't regret it
Im not sure Id risk this being dead weight in my hand, but it has its value and scenarios where it can excel