You might not have an urgent need for a specific card on turns 2-4, so rather than potentially wasting a tutor on a card that could be rendered useless as the game develops, you can simply set yourself up to make a more informed decision later
You can check out everything you need for Disney Lorcanas new set right here
Omniscience was very scary in game 1, but became totally manageable after sideboarding
For example, Marvel Super Heroes Collector Boosters can contain cards from the main set, the bonus sheet, the Commander precons, the Jumpstart Boosters, and the Scene Boxes
Counter Gain #230 (Pokemon Lost Thunder | Pokemon Cards) prices are based on the historic sales
The second number is the number of cards in that set