This is especially true in Commander, where you only have a one-in-a-hundred chance of drawing the specific card you need each turn
These cost 1 mana to cast and 2 mana to sacrifice, but when you do, you get a card and the mana youve spent to crack the egg
Pushing the impactful cards to higher rarities helps make the games more even-keeled in Limited because of card as-fans (the rate at which a certain card or subset of cards show up within an average booster pack) and in casual Constructed because of card availability
The tally currently includes Stranger Things, Fortnite, Street Fighter, The Walking Dead, and Warhammer 40,000, and it'll expand even more with next year's arrival of tie-ins for Lord of the Rings, Doctor Who, and Transformers