Look at the rarity symbol: single star = Rare, double star = Super Rare, H-star = Ultra Rare, and gold-plated edges often indicate Secret Rares
I think one day I may return with a rundown of more underrated choices, but really, it all comes down to how you opt to play the game as well as your favorite blink deck
Look at hand effects let you rubberneck, some cards let you cheat out permanents without paying their mana cost, and infinite hand size cards let you keep more resources than normal
Cards like Orcish Bowmasters and Delighted Halfling are fantastic, but no other card can quite touch the power of The One Ring
Mana Crypt Because Mana Crypt doesnt cost you anything to play, its basically just 2 more free mana, which is incredibly powerful, even if you only get to use it once