Like most Pokmon cards, the value of Charizard-EX 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 (XY Black Star Promos)
With MTGs The Lost Caverns of Ixalan gearing up for full release, spoiler season has revealed all of the cards in the upcoming set
The artwork does such a great job communicating the horror and pain experienced by the character depicted through tiny details like their twisted hand, the way they are feeling their new porcelain face, and their too-wide eyes giving a look of terror that is contrasted by the blank expression of the mask
They draw a hand of seven cards and may choose to mulligan
It was manageable, but not intuitive and I could see new players having trouble getting this right
Translating copious amounts of colorless mana into WUBRG is going to be a challenge, and as previously mentioned, evasion will be at a premium once we actually get that WUBRG OverrunOverrun effect activated