Maybe just this once.
Untethered Express has Trample and Crew 1, requiring you to tap any number of creatures you control with total power of one or more to turn Untethered Express into an Artifact Creature until end of turn
According to the rundown of the contents of an average pack of Mystery Booster 2 , hosted on the official DailyMTG news hub, packs work similarly to how they did with their predecessors from Mystery Booster 1
To qualify as a Bracket One deck, your deck should have: No cards from the Game Changers list No cards that give you extra turns No two-card combos No mass land destruction A minimal number of tutors , aside from land tutors like Rampant Growth
To counter this, use Gustcloak Cavalier, or a card with a similar ability, to attack another card and tap the target creature with Vigilance as part of its attack
Not only does it expand the possibilities of deck building by giving access to your sideboard cards at all times, but it does so while also putting an interesting restriction on the cards that you choose for your sideboard