That's a lot of value for only five mana
Not about the Damage Prevention Step, or whether or not you should be able to use mana from Basalt Monolith to untap Mana Vault, but more about some new promos and B&R updates in sanctioned Magic
Once a creature has attacked, this can be any time the turn it declared an attack, they can pay the Boast cost once to activate its effect
There are a bunch of different cards in Magic: The Gathering, and we are selling a big amount of them, so we organized our bestsellers in different lists of Top 5s: Token, Lands, Commons, Uncommons, Rares and Mythics
A little research into Orzhov Aristocrats decks showed some Humans, but lots of Vampires and Angels as well, so I'm not sure that's a way to go