Your opponent says, Go to attacks, you nod, and they tap the Baloth to indicate its attacking.So, lets say your opponent attacks with a [4] Soraya the Falconers banding ability to create a band of Soraya and a Watchwolf.You must announce that youre using Banding after your opponent declares attackers, but before blockers are declared
And guessing those keywords is where most sellers leave money on the table
All of these questions should factor into your decision, and luckily youre not alone in trying to figure all that out
Also, the player can sacrifice The Witch's Vanity itself for a Bargain effect if they can't afford to or don't want to wait for The Witch's Vanity to make Bargain fodder with Chapters II and III
But in terms of what digital-only cards could do, Seek, Perpetually, and Conjure actually seem like they fall on the tame end of the spectrum to my eyes