The design has a unique mechanism which is quite similar to roulette where you can roll a small ball to a pathway and the ball will go into either 4 holes where 2 holes will have a white mark which indicates heads and 2 non-marked which indicates tails
In reality, while it certainly introduced some new toys for the format, a lot of people associate the set more with the likes of the banned Hogaak, Arisen Necropolis, the obnoxiously expensive Force of Negation, and some really cool Commander cards
Such as with this Espeon EX, which originally went for over $375, but luckily, the Eevee fever died down, and now it is worth less than $200
Control decks or anyone else who wanted to keep a full hand had no choice but to deal with it, or they couldn't play their game
Here is a picture of some of my real Base Pikachus for example, where you can see a lot of different colors
Each deck has 14 old cards from the last couple of sets