Build Around Deck Sometimes you build your entire deck around a certain card
As a +1 ability, you can discard a card
However, some cards in the game can make it so that this card is not returned to the hand at the end of the turn, allowing this card to be a nuisance of a floodgate for the opponent to deal with
In the era of digital TCGs that take advantage of lower production costs to offer a free-to-play + microtransactions experience, no one wants to tell their potential customers that their cards are rising in price every year
(That reminder text really feels wonky to read for some reason.) Rooms, on the other hand, take a few key elements of double-faced cards, and then sprinkle them on newer variants of split card types
Brutal Cathar has already made a massive impact on Standard in just a few short weeks: with its combination of great creature types (its still a Human!), solid beatdown potential and built-in removal, it can swiftly send your opponents on a journey to nowhere