You will also need to use a mix of Trainer Cards including tools, supporters, and stadiums when building your deck
Then, when the next chapter comes, you get to pick a legendary creature from your graveyard and return it to the battlefield, giving it one of three counters to make them stronger
Purely from a design perspective I am really pleased to see the direction they are going in
Having a release valve for powerful cards in older formats that try to lock you out of the game is extremely useful
Multicolor Inevitable Defeat Probably not good enough for three color, but interesting in the way Esper Pixie has shown with Hopeless Nightmare, where the ability to interact with an opponent while taking out chunks of their life can be something you can build around
4 Mindslaver Lets Players Control Each Other It's fairly common for MTG cards, primarily blue ones, to allow players to take control of each other's permanents or get cards from each other's graveyards and put them onto the battlefield under their control