mtg 0 cost cards Category:Zero Mana | Magic: The Gathering Wiki Legal in Modern, Mana Cost:

While Opposition Agent was clearly intended as a tool to fight against higher power decks, it also simultaneously feels like a Stax card (a strategy intended to deny your opponents resources, primarily through mana disruption), a counterspell, and a Word of Command all wrapped up in a 3 mana package, and its impact has reached far beyond the intended purpose

It does, however, win the game on the spot sort of

Unlike a normal Draft Booster, a Set Booster is meant to be more exciting to crack open, which is likely why it is popular among folks who just enjoy opening booster packs instead of using them for Limited play (Draft or Sealed)

This "worlds collide" conflict is amusingly captured on this card