What is Memorial Arena?
By Laz-y • January 15, 2026
What is Memorial Arena?
Memorial arena is basically a game mode where you can get wrecked or wreck 2-3 weekly bosses (depending on your captain level) that change every week (resets/opens at 4am on Tuesdays and finalizes on monday 4am). You have 2-3 SS bosses to take down weekly until you reach captain level 81+ where you get 2 SSS bosses (much tankier) and 1 SS boss per week instead.
Why should you play it?
For all tiers, you can get 100 crystals simply by clearing 8 bosses.

For example, if you have three bosses, you could clear difficulties C to A for two bosses (3 + 3 clears) and C to B for 1 boss (2 clears) to hit 8 clears. If you only have 2 bosses, clearing up till S difficulty for both bosses will enable you to claim the 100 crystals.

For exalted, you can get an additional 40 crystals due to the 2 SSS bosses in exalted tier having a score threshold to receive an additional 20 crystals each: 38400 and 32000 respectively (score difference due to +20% score on first boss)
To get maximum rewards from the SSS bosses, you need 46080 and 38400 respectively (again, score difference due to +20% score on first boss).
As for ranking rewards well, they aren’t too important for casual players considering the ancient willpower isn’t as useful as it used to be and wafer stabilizer (affix locks) are only for sweaty people, and the top 2% get powerful emblems that help them sweat even harder with powerful effects (honestly, the emblem diff between top 2% and top 0.20% is not much difference, both have 2.5% elemental damage. The only difference is resist elemental damage 2.5% > 3%.)

Ancient willpower can be obtained from both ranking rewards and clear rewards, so it will only change your willpower income amount, not completely rob you of it if you don’t mald. Other notable things you get from clear rewards are ancient legacy (lvl 70+) and pri-arm materials (exalted only). Ancient willpower and ancient legacy can be used in a shop called war treasury.
War Treasury

While the value of war treasury has gone down since many of the valks are extremely dated, there are still some useful valks for SS bosses like Lightning Empress (LE), Celestial Hymn (CH), Herrscher of Sentience (HoS), Herrscher of Flamescion (HFS), Herrscher of Thunder (HoT), Fallen Rosemary (FR), Infinite Ouroboros (IO), and Molotov Cherry (MC - mainly for her augment version). However, many SS bosses have far easier 0 second clears for newer valks. Also, you can use them in Elysian Realm for crystals.
Interesting to note, Knight Moonbeam (KMB) and LE have a discounted first fragment purchase of the week at 12 ancient willpower instead of 14.
Personally, I like to continue buying maxed S rank character fragments so that I can convert them to pure witch orbs (gold orbs) to buy newer valks from pure witch orb store (this is only for old players who want to use their excess ancient willpower with nothing else to really use them for).
  
For example, Herrscher of Rebirth, Herrscher of Finality, Herrscher of Human Ego and Herrscher of Origin are still relatively relevant thanks to their relatively new divine keys.
Some Personal Tips
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Make sure to thoroughly plan which valkyries you want to use for each boss before committing. Once you lock the valk and her gear to a specific boss it is IRREVERSIBLE for the rest of the week.
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If there are multiple potential lineups for each boss, you might want to abuse the training mode to see which lineup feels more comfy for you first, just because there are youtube refs with a specific team, it doesn’t mean you can replicate it (skill issue, fps, etc - some dalaos will say their rot is easy, but you can’t trust their definition of easy /hj). Alternatively, thanks to the “Restart Challenge” button at the end of your runs, you don’t really need to use training mode anymore. If the score is really good, you can finalize, if not, you can restart challenge, pause and quit, the valks you used in that run will not be locked to that boss. HOWEVER!!! Don’t be too quick to lock in because even if the team is comfy for one boss, making it slightly less comfy to make another boss less of a hell might be a better choice sometimes!
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If you really struggle to clear, you can consider using buffed mode, it will tank your score but if it enables you to at least clear the boss, it’s better than nothing!
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If you can’t really be bothered to try-hard memorial arena, if you are a dolphin/whale or just an old player with a sizable roster anyway, you could just quickly browse through lineups in-game for quick inspiration. As long as you know general valk team rots, you can relatively unga bunga your way and get necessary rewards with the top teams.

For example, you can see I have the premium team used for this boss but my score is terrible cause i just winged it… But challenge rewards and SSS rank point thresholds are reached so i don’t bother after.

That’s it! Sorry if it was a useless “guide”.
If you can write better please get in touch with us! Would be glad to have a proper MA guide writer!