Chaos Zero Nightmare Memorial Quartz lets you choose Memory Fragment Substats when crafting. Since the 11 November update, selecting one Substat costs one Memorial Quartz, while selecting two costs three. That gives you more control over a new Fragment, but it also makes planning your limited crafting currency important.
The difference between crafting and readjusting matters here. Selective crafting gives you some control over a new Fragment, while readjustment is a separate new feature for working with an existing one. You can buy Memorial Quartz in the Hero Memory Archive, but there’s a monthly purchase limit. Here’s what you can actually choose and what the patch confirms about the costs.
Chaos Zero Nightmare Memorial Quartz: what does it do?
Memory Fragments have a Main Stat and Substats. The update also changes the old Main Option and Sub Option wording to these names, so guides using the older labels are talking about the same stat categories. The new selective-crafting screen lets you nominate secondary stats while making a Fragment.
You can select one or two Substats. A selected Substat cannot duplicate the Fragment’s Main Stat, so not every stat will be available in every recipe. If a stat is greyed out, check whether it matches the Main Stat before assuming you’ve missed an unlock requirement.
The crafting price is fixed by how many Substats you choose: one Memorial Quartz for one or three Memorial Quartz for two. You cannot select the same stat as the Fragment’s Main Stat. Check the selection before you craft, particularly when spending the more expensive three-Quartz option.
Where to buy Chaos Zero Nightmare Memorial Quartz
Open the Momentary Memory Archive and look inside the Hero Memory Archive. That’s where Smilegate added Memorial Quartz in the 11 November update. Each purchase costs 40 Moments of the Radiant Hero, with a limit of four purchases per month.
That restriction means you can’t simply buy as much as you like by farming more archive currency. The number of times you can purchase from this listing matters when deciding which Fragment is worth upgrading. If you’ve already bought the monthly stock, check the shop’s current reset information before planning another craft.
The same shop also sells Shuffling Quartz at 80 Moments of the Radiant Hero, with eight purchases per month. They are different items. Don’t buy Shuffling Quartz by mistake when the selective-crafting screen asks for Memorial Quartz.
How to select Substats when crafting Memory Fragments
Go to Memory Fragment crafting and start with the Fragment you want. Look at its Main Stat first, since that determines which Substats you’re allowed to select. Then choose the permitted Substats at the selection stage, keeping in mind that the limit is two.
If you need only one particular secondary stat, you can select it for one Quartz. If you need two, the cost jumps to three. It’s worth picking a Fragment with the right Main Stat first, rather than spending a limited currency trying to rescue an otherwise poor piece.
Once you’ve chosen, inspect the crafting result rather than assuming that selecting a Substat fixes every other property of the piece. The feature provides control over selected stats, not an across-the-board promise about levels, rolls or every other value.
Substat Readjustment is a separate feature
Substat Readjustment works on an existing Legendary Memory Fragment upgraded to +5. It keeps the same Substat types but rerolls the upgrade counts and the bonus values assigned to them. It cannot change one kind of Substat into another.
Readjusting costs one Shuffling Quartz without excluding a Substat, or two if you exclude one. The excluded Substat won’t receive upgrades, and if it already had upgrades, those bonuses return to their original, non-upgraded value. Exclusion is not a way to preserve an especially strong upgraded roll.
This system also has nothing to do with removing Divine Epiphany from Save Data cards. That process uses a Core of Annihilation. Memorial Quartz is for Memory Fragment Substat selection, not for altering a card’s Epiphany.
Should you spend Chaos Zero Nightmare Memorial Quartz straight away?
The simple rule is to craft for the stat types you want, then readjust only if the upgrade distribution is poor. Chaos Zero Nightmare Memorial Quartz is spent on selecting Substats during crafting, while Shuffling Quartz changes the upgrade allocation on a +5 Legendary Fragment. They aren’t substitutes for one another.
Memorial Quartz costs 40 Moments of the Radiant Hero per shop purchase, limited to four a month. Shuffling Quartz costs 80 each, limited to eight monthly purchases. The biggest thing to remember is that two selected crafting Substats cost three Memorial Quartz, while readjustment uses a different currency entirely.
Official publisher source: Smilegate’s official STOVE Update Notices board (11 November 2026 update).
