
The Arcana system in MementoMori gives stat boosts to your characters once you awaken certain witches. Read on to learn more about arcanas and what the best arcanas to unlock are.
List of Contents

As you play MementoMori and unlock more witches, you'll soon start awakening the ones you like. But, if you awaken specific witches, you'll unlock Arcanas that give various stat boosts depending on who you awakened.
If you awaken the right characters, you can give all your witches good stat advantages in all their fights.
| Best Arcanas to Unlock |
|---|
|
|
| All Monoceros's Roar Arcana Characters | |||
|---|---|---|---|
Sabrina
|
Amour
|
Ivy
|
Nina
|
| Lv | Unlocked Effects | Arcana Group Max Awaken | Enhanced Targets | Stats Affected |
|---|---|---|---|---|
| 1 | Unlock SR | - | Arcana Group |
・ATK: 500
・CRIT DMG Boost: - |
| 2 | Unlock UR | - | Arcana Group |
・ATK: 5000
・CRIT DMG Boost: 15.00% |
| 3 | Unlock LR | - | All Characters |
・ATK: 5000
・CRIT DMG Boost: 15.00% |
| 4 | Unlock LR+5 | 1 | All Characters |
・ATK: 5000
・CRIT DMG Boost: 15.00% |
| 5 | Unlock LR+6 | 1 | All Characters |
・ATK: 6000
・CRIT DMG Boost: 16.00% |
| 6 | Unlock LR+7 | 1 | All Characters |
・ATK: 7000
・CRIT DMG Boost: 17.00% |
| 7 | Unlock LR+8 | 1 | All Characters |
・ATK: 8000
・CRIT DMG Boost: 18.00% |
| 8 | Unlock LR+9 | 1 | All Characters |
・ATK: 9000
・CRIT DMG Boost: 19.00% |
| 9 | Unlock LR+10 | 1 | All Characters |
・ATK: 10000
・CRIT DMG Boost: 20.00% |
The Monoceros' Roar arcana gives a 5,000 ATK stat boost and a 15% CRIT DMG boost for all your characters once you get Sabrina, Amour, Ivy, and Nina to LR rarity. While Nina would be useful in PvP, the other three witches might not be a priority for you to awaken, so it'll take quite some time before you unlock the full effects of this Arcana.
| All Pyxis's Ferocity Arcana Characters | |||
|---|---|---|---|
Tainted Iris
|
Ivy
|
- | - |
| Lv | Unlocked Effects | Arcana Group Max Awaken | Enhanced Targets | Stats Affected |
|---|---|---|---|---|
| 1 | Unlock SR | - | Arcana Group |
・CRIT DMG Boost: 5.00%
・ACC: - |
| 2 | Unlock UR | - | Arcana Group |
・CRIT DMG Boost: 10.00%
・ACC: Chara Lvl x 70 |
| 3 | Unlock LR | - | All Characters |
・CRIT DMG Boost: 10.00%
・ACC: Chara Lvl x 70 |
| 4 | Unlock LR+5 | 1 | All Characters |
・CRIT DMG Boost: 10.00%
・ACC: Chara Lvl x 70 |
| 5 | Unlock LR+6 | 1 | All Characters |
・CRIT DMG Boost: 10.50%
・ACC: Chara Lvl x 75 |
| 6 | Unlock LR+7 | 1 | All Characters |
・CRIT DMG Boost: 11.00%
・ACC: Chara Lvl x 80 |
| 7 | Unlock LR+8 | 1 | All Characters |
・CRIT DMG Boost: 11.50%
・ACC: Chara Lvl x 85 |
| 8 | Unlock LR+9 | 1 | All Characters |
・CRIT DMG Boost: 12.00%
・ACC: Chara Lvl x 90 |
| 9 | Unlock LR+10 | 1 | All Characters |
・CRIT DMG Boost: 12.50%
・ACC: Chara. Lvl x 95 |
Pyxis's Ferocity is an alternative arcana you can aim for if you want a CRIT DMG Boost as soon as possible. However, you will have to awaken Ivy and Tainted Iris - both limited SR characters.
| All Charmaeleon's Quelling Arcana Characters | |||
|---|---|---|---|
Fenny
|
Dian
|
- | - |
| Lv | Unlocked Effects | Arcana Group Max Awaken | Enhanced Targets | Stats Affected |
|---|---|---|---|---|
| 1 | Unlock SR | - | Arcana Group |
・ACC: Chara Lvl x 30
・CRIT RES: - |
| 2 | Unlock UR | - | Arcana Group |
・ACC: Chara Lvl x 70
・CRIT RES: Chara Lvl x 30 |
| 3 | Unlock LR | - | All Characters |
・ACC: Chara Lvl x 70
・CRIT RES: Chara Lvl x 30 |
| 4 | Unlock LR+5 | 1 | All Characters |
・ACC: Chara Lvl x 70
・CRIT RES: Chara Lvl x 30 |
| 5 | Unlock LR+6 | 1 | All Characters |
・ACC: Chara Lvl x 75
・CRIT RES: Chara Lvl x 31 |
| 6 | Unlock LR+7 | 1 | All Characters |
・ACC: Chara Lvl x 80
・CRIT RES: Chara Lvl x 32 |
| 7 | Unlock LR+8 | 1 | All Characters |
・ACC: Chara Lvl x 85
・CRIT RES: Chara Lvl x 33 |
| 8 | Unlock LR+9 | 1 | All Characters |
・ACC: Chara Lvl x 90
・CRIT RES: Chara Lvl x 34 |
| 9 | Unlock LR+10 | 1 | All Characters |
・ACC: Chara. Lvl x 95
・CRIT RES: Chara. Lvl x 35 |
For defensive arcanas, you can look into unlocking Chamaeleon's Quelling, which grants boosts with both Accuracy and CRIT RES. However, like with Pyxis's Ferocity, you'll have to awaken a limited SR character - in this case, Fenny.
| All Gemini's Wings Arcana Characters | |||
|---|---|---|---|
Freesia
|
Rean
|
Dian
|
- |
| Lv | Unlocked Effects | Arcana Group Max Awaken | Enhanced Targets | Stats Affected |
|---|---|---|---|---|
| 1 | Unlock SR | - | Arcana Group |
・EVD: 150
・DEF: - |
| 2 | Unlock UR | - | Arcana Group |
・EVD: 1500
・DEF: 1.00% |
| 3 | Unlock LR | - | All Characters |
・EVD: 1500
・DEF: 1.00% |
| 4 | Unlock LR+5 | 1 | All Characters |
・EVD: 1500
・DEF: 1.00% |
| 5 | Unlock LR+6 | 1 | All Characters |
・EVD: 2000
・DEF: 1.50% |
| 6 | Unlock LR+7 | 1 | All Characters |
・EVD: 2000
・DEF: 2.00% |
| 7 | Unlock LR+8 | 1 | All Characters |
・EVD: 3000
・DEF: 2.50% |
| 8 | Unlock LR+9 | 1 | All Characters |
・EVD: 3500
・DEF: 3.00% |
| 9 | Unlock LR+10 | 1 | All Characters |
・EVD: 4000
・DEF: 3.50% |
This arcana is one of the easier ones to awaken all the way to LR because all three units are regular base SR rarity units that aren't locked behind limited gacha banners. At LR, all your units will gain 1500 EVD and 1.00% more DEF. Having more EVD is always good, as evading attacks essentially wastes an opponent's turn. If you find that you have an abundance of Crimson fodder to spare for Awakening, look to acquire this Arcana and give your units a nice defensive boost.
| All Gilsania's Serenity Arcana Characters | |||
|---|---|---|---|
Liselotte
|
Florence
|
- | - |
| Lv | Unlocked Effects | Arcana Group Max Awaken | Enhanced Targets | Stats Affected |
|---|---|---|---|---|
| 1 | Unlock SR | - | Arcana Group |
・ATK: 1.00%
・PM. DEF Break: - |
| 2 | Unlock UR | - | Arcana Group |
・ATK: 2.00%
・PM. DEF Break: 250 |
| 3 | Unlock LR | - | All Characters |
・ATK: 2.00%
・PM. DEF Break: 250 |
| 4 | Unlock LR+5 | 1 | All Characters |
・ATK: 2.00%
・PM. DEF Break: 250 |
| 5 | Unlock LR+6 | 1 | All Characters |
・ATK: 2.10%
・PM. DEF Break: 255 |
| 6 | Unlock LR+7 | 1 | All Characters |
・ATK: 2.20%
・PM. DEF Break: 260 |
| 7 | Unlock LR+8 | 1 | All Characters |
・ATK: 2.30%
・PM. DEF Break: 265 |
| 8 | Unlock LR+9 | 1 | All Characters |
・ATK: 2.40%
・PM. DEF Break: 270 |
| 9 | Unlock LR+10 | 1 | All Characters |
・ATK: 2.50%
・PM. DEF Break: 275 |
This Arcana boosts two of the most important offensive stats in the game, PM. DEF Break and ATK. What's more is that Florence, one of the best offensive witches in the game, is in the Arcana group, meaning she can reap the full strength of this Arcana at only UR. It's worth noting that Liselotte can be pretty tough to come by as a limited unit. Even if you don't like her character or her kit, consider still pulling for her for this Arcana.
| All Aquarius's Comet Arcana Characters | |||
|---|---|---|---|
Rusalka
|
Primavera
|
- | - |
| Lv | Unlocked Effects | Arcana Group Max Awaken | Enhanced Targets | Stats Affected |
|---|---|---|---|---|
| 1 | Unlock SR | - | Arcana Group | ・PM. Def Break: 200 |
| 2 | Unlock UR | - | Arcana Group | ・PM. Def Break: 500 |
| 3 | Unlock LR | - | All Characters | ・PM. Def Break: 500 |
| 4 | Unlock LR+5 | 1 | All Characters | ・PM. Def Break: 500 |
| 5 | Unlock LR+6 | 1 | All Characters | ・PM. Def Break: 505 |
| 6 | Unlock LR+7 | 1 | All Characters | ・PM. Def Break: 510 |
| 7 | Unlock LR+8 | 1 | All Characters | ・PM. Def Break: 515 |
| 8 | Unlock LR+9 | 1 | All Characters | ・PM. Def Break: 520 |
| 9 | Unlock LR+10 | 1 | All Characters | ・PM. Def Break: 525 |
PM. DEF Break is one the game's most impactful and sought-after stats, Rusalka is one of the most popular limited units, and Primavera is one of the most useful supports in the game. All aspects of this Arcana is good from the characters to its effects. Both these units are well worth upgrading to LR, so you might as well get the bonus PMDB from this Arcana as well.

| Trial Guides | |
|---|---|
| List of All Trials and Their Rewards | Cave of Space-Time Guide |
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| PVP Guides | |
|---|---|
| When Should You Start Playing PvP | Battle League PvP Guide |
| Legend League PvP Guide | PvP Team Building Guide |
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