Dark Return
x4
1
Lingering Influence
x2
2
Annihilate
x3
2
Lost Scroll
x4
3
Copperhall Bailiff
x4
3
Desecrate
x3
3
Hidden Road Smuggler
x4
3
Kerendon Merchant
x4
3
Lifedrinker
x4
3
Winchest Merchant
x4
4
Vara, Vengeance-Seeker
x4
4
Xenan Fanatic
x1
5
Harsh Rule
x4
9
Savior of the Meek
x4
Justice Sigil
x6
Shadow Sigil
x4
Argenport Insignia
x4
Crest of Vengeance
x4
Emerald Waystone
x4
Seat of Vengeance
x4
View Deck on Shiftstoned
When you have Dizo's Racket and Kesava out, playing Lifedrinker will draw cards up to max hand size, then mill until your deck runs out, give you 999 health plus 999 armor and make Kesava a 999/6. This is because Racket is dealing you damage, but Lifedrinker gave you Lifelink, so the damage triggers Kesava, which gives you armor, which triggers Racket, and on until your deck runs out of cards. Since you now have an empty deck, you need to win right away, and there are a couple ways to do this. If Kesava was played on a previous turn, you can just attack with her, using Vara's Intervention out of the market to make her unblockable. You can also use Xenan Fanatic's triggered ability to hit your opponent for 999 damage. Since there is only one Fanatic, this is generally only an option when you have a bunch of power, to let you Dark Return the Fanatic back after you've dumped your deck into the Void. Dark Return also lets you try again if Kesava gets removed. You generally want to get Racket out as early as you can afford to fetch and play it, as it turns your Waystones into cantrips and draws you 3 from Righteous Intent.
The rest of the deck is just letting you get to that combo: 12 merchants for obvious reasons, removal, Harsh Rules, plus Gauntlet all-stars Copperhall Bailiff and Savior of the Weak. Both are extremely good against the aggressive AI decks and Savior even provides easy merchant fodder.
Its a great deck for the extremely-high MMR Gauntlet, where you're just dealing with nonstop nonsense from all the high-variance AI decks. Having an unstoppable win-condition is important for ending games quickly after you've stabilized, since the AI will always just dump its hand and hope for the best. It also has a lot of good match-ups against the boss decks, making it good for clinching 7-0s.