Mono J Partnership Agreement

Here's another deck built on a really weird concept. This time, it's the fact that you are way better than the AI at using extra power you get from Partnership Agreement. The AI decks don't have any high cost threats that can't just be removed that aren't named Icaria, the Liberator, and this deck contains a bunch of cards that basically just win the game with the 15+ power Partnership Agreement gives you eventually.

This deck is pretty slow, and it also can struggle sometimes against really fast AI decks. However, fortunately a lot of the cards in it are also really good in other decks (cough Combrei Equalize cough), so experienced players will probably have a lot of it already.

Without further ado, here's a more in-depth look at the decklist:

Builder's Decree puts a ton of monstrously huge units on the board after long enough. It can also kind of help early game against a ridiculously fast deck to prevent it from dumping its entire hand, I guess.

Justice Etchings, Plate Grafter, and Winchest Merchant give you 11 market access cards, which is good for a deck with its main engine in the market. Who would've thought? (If you don't mind being unable to grab every market card with every market entry, you could maybe replace something with Fearless Crescendo, though I'm not enthused about 2/3 of the market access requiring a unit.)

You have to be VERY careful with Icaria, Valkyrie Captain in Gauntlet. Vara's Favor and Firemane Cub are fairly common and will ruin your day. Nevertheless, if the AI deck doesn't have those you have a ramp card that stays relevant in late game. Pretty good.

Auren Condemnation and Mystical Shackles are your single target removal. Watch out for face aegises on the latter.

Equalize is a stupid card and works to its full effect here. The AI is absolutely incapable of playing around it and will get completely hosed. You can't be afraid to completely tank your hand against faster decks that play their entire hand by turn 3 with this one, either. It's better than being dead.

Parliament Elder serves as both a ramp card and a wincon with Unleash in a long game with a bunch of sigils from Partnership Agreement. It's possible to fill most of the board with these birds if the game goes long enough.

Harsh Rule and Save the Day deal with a bunch of units at once, if you need to. Pretty much essential in a slower deck that gives your opponent a bunch of power.

Marshal Ironthorn doubles the crazy amount of power you're playing and can clear your opponent's field in a long game.

Stormhalt Plating is the classic Justice control finisher and mana fixer in a pinch. It also removes the aforementioned Icaria, the Liberator, which is otherwise a massive pain in your backside.

The power cards get to make an appearance here, too! Justice Sketch and Rune of Law, due to the absurd amount of power you can end up with, are actually quite capable of winning the game themselves as long as you have a unit. They'll also pretty much never be depleted.

As for the market,

Manacles deals with two units in a pinch, and the AI is not smart enough to remove one of the targeted units to free the other. So that's nice.

Partnership Agreement is the entire core of the deck. Play more sigils, remove everything the AI plays with those sigils, and eventually drop a Decree for 17 or something.

Mantle of Justice turns pretty much any unit into a monster with enough sigils. This is the market card I'm least convinced about. Maybe Pristine Light is better here.

From the Heavens is a board clearer in the market that doubles as a win condition. Wiping the board and then immediately filling your side with 2/2s is usually good enough to put the AI to bed.

Martyr's Chains pretty much wins the game on the spot against the AI, especially if you have Partnership Agreement up. It's also good if you want to see that sweet -999 at the end.