Toggle the Craft switch at the top right of the main deck building screen
It is an artifact that gives a creature, defensive power, and Haste
The English PGO set has its own exclusive treatments (Giovannis Charisma SR, a different Mewtwo VSTAR alt art, rainbow versions of Radiants), but the Mewtwo V Special Art is Japanese-only
In a typical Commander deck that doesn't build around her, that will likely be: Land - pretty sure Creature - likely Sorcery or Instant - at least one, maybe both Then maybe an artifact, enchantment or planeswalker That means you could easily draw four or five cards in a typical 10 set and choose the best one for the situation, like the best land your reveal
Goblins have always been around in some form or another, and they're usually a problem
Put each other card exiled this way on the bottom of your library in a random order