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InCivilization 7, players earn Mementos as they progress through the game, leveling up their leaders and making strides down their Foundation Path. You’ll gain both your slots quite early: at Level 3 and Level 5. From there, every time you start a new game, it’ll be time to determine which of your earned Mementos to slot into your chosen leader.
Since there’s a pretty big difference in experience with the game between just starting out - with limited access to the system - and playing enough with every leader to earn them all, we’ll offer our suggestions regarding each leader’s earlyandlate Memento choices.

This guide’s a work-in-progress as we continue to explore every leader in full. Sorry about that - the rest is coming!
Amina
Economic Militaristic
Aminameans business - and warfare. She’s perfectly posed todestroy rival civs and make solid profits simultaneously, with a+5 combat strength in Plains and Desert tiles across the board for every military unit in the game.
Meanwhile,every city gets +1 Resource Capacity, which is franklypretty greatgiven thatthroughout much of the game, getting Resource Capacity slots isn’t an easy job. The+1 gold per age for every Resource Capacity slotis a nice perk.

So, where does that leave Amina for Mementos? It depends on which of her strengths you intend to pursue more vigorously, as will be the case with several of the leaders we’ll be mulling over. Broadly speaking, however, you can’t go wrong with the following.
Ashoka, World Conqueror
Diplomatic Militaristic
Ashoka, World Conquerorpulls off the impressive feat oftriggering heaps of Happiness during wars. His Happiness boosts are also superb for your overall Production. He gains+1 Production for every five excess Happiness in a city.
Ashoka also earns+10 Production for all cities not founded by you, AKA the ones you conquered. Declaring aFormal Wargrants aCelebration, andall military units gain +10 Combat Strength against districts during Celebrations.

Making sure you’re declaringFormalWars means aiming to make a civilizationHostile toward youbefore you tell them the gauntlet’s been thrown, so some of Ashoka’s best Mementos build toward that end.
Ashoka, World Renouncer
Diplomatic Expansionist
Ashoka, World Renounceralso relies on Happiness to a considerable extent. With+1 Food per every 5 excess Happiness, +10 percent food for all settlements during Celebrations, and +1 Happiness adjacency to all buildings,he is,in fact, far more Happiness-centric than his alter ego.
As you can see, this Ashoka thrives on making his cities as vast as possible, and thus, as capable of great things of all kinds as they can feasibly become.You’ll want to boost Happiness ever further and/or go directly toward more Foodin order to play to his strengths.

Augustus
Cultural Expansionist
Augustusoccupies one of the more interesting niches in the game. While you’ll always want some towns alongside your cities,it’s imperative that you maintain a decent balance between the two settlement types if you’re playing as Augustus.
For every town in your empire,your capital gains +2 Production.You’ll uniquely becapable of purchasing Culture Buildings in towns, making themslightlymore akin to cities. And every building you purchase in towns costs50 percent less than what other leaders must pay.
Hence, some of what we’re looking for herejunctions well with having a higher number of towns. There isn’t much on the menu for that specific scenario, sowe’re also looking for broader Cultural gains, since that’s a relatively strong overall path for Augustus.