Like most Pokmon cards, the value of Cheryl depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Battle Styles)
You give your opponent four turns or less to come up with answers to your massive game-ending cards like Cresting Mosasaurus, Rise of the Eldrazi, and Emrakul, the World Anew
Long Card Box Black 1
At one white mana and instant speed, Swords is the go-to spell for spot removal
But one area in particular, the green circle on the back of the card, shows a distinctive L shape of four red dots against a green background
Its also a Secret Rare card, meaning that its numbering goes above the official number of cards in the set