Craft with artifact two generic, one blue mana (Two generic, one blue mana, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owners control
However, if you want to stay competitive, youll definitely want to go full meta
Staff Room is nice if you already have several face-down creatures who can get in for damage, since growing those creatures and flipping them for free is great
Each card in this slot hasn't appeared with a white border before this, making it your first chance to grab highlight cards like a white-bordered Goblin Guide or Uro, Titan of Nature's Wrath
Raffine, Scheming Seer Raffine, Scheming Seer turns a board of dorks into a bunch of scary attackers
The subsection of the Magic community that loves to collect things decided that Reserved List cards are desirable because of how old, cool, and scarce they are, and it looks like original set foils might be the next big subsection of cards to get that treatment