there is synergy between cards which makes the relation between "card value" and "deck value" highly nonlinear (silly example: Instill Energy and Colossus of Sardia, by themselves, are crap
Cards like Timetwister, Bazaar of Baghdad, The Tabernacle At Pendrell Vale, and Mishra's Workshop all come to mind
Chalk Outline
This Gold Star is one of the standout cards in Team Rocket Returns, as it bucks the trend of Rocket's Pokemon and introduces the Star subset, which features shiny versions of popular Pokemon
Paradox Rift comes with over 260 cards, and you can check out the Paradox Rift Card List to see them all for yourself
Again, its a great way to get a decent amount of packs, with a nice box to store and sort your decks and spares