It draws a given number, in this case four for five mana, one more mana and card than Harmonize, Concentrate or Ambition's Cost
The result is a deck that can develop high-power threats on the board far ahead of schedule
(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield.
For only three mana, you can tap [c]Arena[/c] to have a creature you control fight a creature an opponent controls of their choice
Packs may contain Special Guests, Mana Foils, Extended-Art cards, plus borderless cards, Rares, and Mythics well-positioned to become your collections new crown jewels