Clay said Arena is testing a system where players win one every time they compete, up to 30 cards a day
In most cases, Barbed Servitor will act as a four mana Phyrexian Arena that also deals one damage to your opponent each turn: a solid card, most would agree
Drumbellower To crew a Vehicle, you'll need to tap a creature(s), and if they don't have vigilance, the Vehicle will stay tapped too, leaving you potentially defenseless
But if you have a way to perpetually add more counters to it, or even better, prevent any counters from being put on in the first place, Crack in Time will never have to be sacrificed
But, since youre only playing one game per match, there is no sideboarding phase
There are tons of ways to use equipment, too