This was an intentional choice by the formats original creators to encourage deck diversity, but it has always felt counterintuitive to many players
It's theoretically possible that, if you were to weigh literally thousands of packs to choose your heavy favorites, and bought hundreds of them, you might get a slightly higher pull rate of rare cards than if you bought the same number of random packs - but I don't recommend it, for two main reasons: Most game stores don't permit you to weigh individual booster packs before buying them - mostly because it takes a long time and holds up the line
At the end of the day, when you're getting a free, massive dinosaur every turn it's hard not to win games
When the poem is finished, the foe will be no more
The concept, the art, the story, everything about them makes the horror nerd in me really happy
Here's what's available: Android Two options: Delver Lens from the Play Store (older version with some additional features) or the web version through Chrome