Only playable in a select few formats, Brainstorm's strength lies in the sheer amount of card selection it gives you
Arena Tutor tracks every Arena gameplay stat that matters: full Match History to check your results by format and deck, post-game stats to review your game, deckbuilding suggestions when you are rounding up a Limited deck, and more
Especially since its a 1-drop, the pain will come quickly
In exchange for only being allowed one in a deck, these cards have powerful effects
or if you already have an Army (thanks to some seemingly innocuous Hexproof on the opponent's end step) you can smash them post-Invade the City
Its Evil Claw attack makes sure that if your opponents Pokemon is Basic, they cant attack next turntalk about a good time-out