The restriction that Lurrus imposes on players is that their deck cannot contain any permanents with a mana value higher than two
But what makes Beseech the Mirror the best card in Wilds of Eldraine is that it not only tutors any card in your deck for a cost of four but that it puts that card directly onto the battlefield if the Bargain cost is paid
It can hit as a 4/3 hasty trampler by itself, but its better used to give, say, +3/+0 and haste to a bigger threat
To set out the game, place the paper playmat in the middle of the table , placing the Ursula card in the space in the middle
Bonus remark: You can play Kaheera, the Orphanguard in a Vadrok EDH deck, but not the other way around
(Also paying the waifu tax, a real thing in Magic collecting.) All the cheaper copies got bought out in TCGPlayers last sale, the card is up $20 in the past couple of weeks, and by the end of this calendar year, this will have broken through $400 and be staring at $500