This year's been pretty light on Charizard, which is a sure-fire way for an expansion to sell
Not to mention that Little John, Resourceful Outlaw needing to be exerted to have his effect take hold is an easy cost to pay, considering how many resistant Bodyguards your opponents will likely have to get through to challenge him.
I forgot to distribute an energy card, and before I ended my turn, the app acted as a coach, nudging me to not attack before making all possible moves to level up my character first
Universes Within cards maintain the original mechanics but with new names to fit their appearance in other sets
2019: Oko, Thief of Crowns from Throne of Eldraine It's hard to not pick Oko as the most broken card of the year just for its endless Elk memes and that one time that someone won an Eternal Weekend by turning a Black Lotus into an Elk, plus the fact that it was swiftly banned in every format and sort of broke Wizards ' brains when they admitted they didn't actually test the +1 on their opponent's stuff and mostly just Elked their own things, for some reason
It also seems to align with the goals of Hidetsugu, Devouring Chaos