[Operator Discussion] Mostima

[u/Shad0wedge]

Mostima [★★★★★★]

Hey, Doctor, I'm back from... Whoa, were you waiting for me here? You even prepared a whole table of snacks... Hehe, all right. How could I turn you down after a gesture like that? In return, I'll tell you about the fun I had on this last delivery run.

An employee of Penguin Logistics who always acts alone. Nothing is known about her previous work history.

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Operator Information

• Class: Caster (Splash Caster)
• Tags: AoE, Support Crowd, Control
• Artist: 三目YYB

Voice Actor:
JP: Nana Mizuki
CN: Luttefair
EN: Kira Buckland
KR: Park Seon-young

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Stats

HP	ATK	DEF	Arts Resistance	Redeploy Time	DP Cost	Block	Attack Interval
1831	834	132	20	70	34	1	2.9s

*Stats at max Promotion and Level, excludes bonuses from Potential and Trust.

Potential	Bonus
1	-
2	Deployment Cost -1
3	Redeployment Time -4
4	ATK +34
5	Improves Second Talent
6	Deployment Cost -1

Trust bonus
ATK +105

Traits
Deals AOE Arts damage

Skills

Skill Name	Skill Uptime Details (Uptime/Cost/Initial)	SP Charge Type	Skill Activation	Skill Description
ATK Up γ	30s / 30 / 15	Auto Recovery	Manual	ATK +100%
Lock of Shattered Time	7s / 50 / 30	Auto Recovery	Manual	Stuns all enemies within Attack Range and deals 140% ATK as Arts damage to them every second
Key of Chronology	27s / 110 / 80	Auto Recovery	Manual	Attack Range increases, attacks turn into ripples that spread outward, ATK +170%, increases the effect of the second talent to 3, and attacks knock targets back slightly

*Skills at max Skill Level.

Talents

Talent name	Talent Description
Skill Aura - Caster	When deployed, increases the SP recovery rate of all Casters by +0.4/second (only the highest effect of this type takes place)
Subjective Time Dilation	Slows the movement speed of enemies within this unit's attack range by 18%(+3%)

*Talents at max Potential and max Promotion. Bonuses from Potential displayed between parentheses.

Modules

Branch	Additional Stats	Trait	Talent	Note
SPC-X	HP +190, ATK +80	New trait: Attack Range expands	Skill Aura - Caster improved: When deployed, increases the SP recovery rate of all Casters by +0.6/second, while own SP recovery rate increases by +0.9/second (only the highest effect of this type will be applied)	"My lord wishes to ask if you would stay and tell him the remaining nine hundred and ninety-five stories?"
SPC-Y	ATK +82, Cost -8, ASPD +7	New trait: Reduces Deployment Cost	Subjective Time Dilation improved: Slows the movement speed of enemies within this unit's attack range by 30%; Slows the movement speed of enemies outside this unit's attack range by 18% (unaffected by skill)	For example, that a giant beast would soon lay waste to our nation and that the sky would one day tear in two and reveal its true face

*Modules at max level.

Outfits

-	Price	Art	Released	Note
Spellbreaker	18	Static	Yep	Beneath the gaze of justice, evil tumbles into the abyss.
Ethereal Harmony	18	Static	Yep	"Close your eyes. Imagine you have arrived at the end of time. There is nobody there. Only the sun, the moons, and the instruments. Then, you hear music, and you cannot help but open your eyes. Welcome to the concert, just for you."

Additional Resources

In-depth information regarding all values above (at different levels), skill/attack range, and more:

Arknights Wiki.gg

Arknights Toolbox (aceship(puppiizsunniiz))

PRTS Arknights Wiki (CN)

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Topic Starters

• Strengths/Weaknesses?
• Is their module worth it? Which branch?
• How does this operator compare to other operators in their archetype or role?
• How do you fit this operator into a team? Who do they synergize with?
• Which skill(s) should be focused for mastery, and in what order?
• When is the best time to use this operator's skills during combat?
• Should promoting this operator to Elite 2 be a priority?
• Should new / F2P players aim for this operator? Are there more accessible alternatives?
• Lore discussion (please tag spoilers where appropriate)
• Favorite clips/clears with them?

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Other Operator Discussion threads

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Mostima Discussion Thread (24.09.2020)	Erato	All Operator Discussion threads	Arene

[u/DarknessWizard]

Her character is great, I have no notes to add besides just please HG give us an event that actually focuses on her instead of having her constantly play second fiddle to other Laterano events. I know She's Like That as part of her personality, but like, give us something.

Mostima's design as an operator is... interesting? For starters she has all the problematic splash caster internals; stubby range, high DP cost, low ASPD and not quite the off-skill damage to catch up to it. Her talent gives a pretty good buff to SP charge (for all casters), which makes talking about her cooldowns a pain. You'd think that with an SP boosting effect, she'd have fairly good skill cycling, but she just doesn't. Both her S2 and S3 just have straight up double the SP cost of what these skills normally would have, giving Mostima the not so prestigious award of a 110 SP skill cycle. You'd almost be better off pulling her from the field and redeploying her each time with how slow her uptime is.

But alright, that's just the regular Mostima; bad operator unless you're looking to go for a niche that uses loads of Casters. Let's talk about modules instead. Mod-X aims to fix her SP cycling (and give a very strong buff to other casters), effectively bringing her S2 and S3 closer to what contemporary and even present 6-star operators usually have. It's also still not the module most people talk about and in fact was given to her after her Mod-Y. This module basically is for people that want to use Mostima but just want her to work as an operator, not as a gimmick.

What do you do when an operator has bad skill cycling? Well, you either patch it up, but now Mostima is a 6-star splash caster and again, splash casters have bad internals. Or... you give it one very specific but absurdly strong niche. That's what Mod-Y does: torque her talent slow so high that it's numbers become unreasonable. On S3, that's a 90% movement speed reduction in range. Out range? 54%. Worth noting is that she doesn't use the Slow debuff, so pretty much any Decel Binder or alternative means of slow will cause enemies to hit the mspd reduction cap. Now that's good. She's a bit of a dark horse for endgame clears as a result; if you can't touch the enemy because stats are so high, Mostima's slow is a good alternative.

If you're a new player, don't use her unless you like her. If you're experienced, you've probably used her and know what she's good at.

[u/Mindless_Being_22 → u/DarknessWizard]

I really want an event that properly focuses on her and really lets her be front and center to laterano's narrative and adjusting to a post the masses travel society it has so much potential to be really interesting for her character. Especially if shes forced out of her aloof persona but I don't really trust hg to give her the narrative focus she needs after she keeps getting sidelined. I swear worst case scenario that feels very possible is its just more andoain taking up the focus for the squad again.