Hassan of the Serenity

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April Fool's
Lawful Evil
Max HP 9,310
HP Rank
Max ATK 6,636
ATK Rank
Base Atk1,232Base HP1,675
Max Atk 6,636 Max HP 9,310
Grail Atk 8,981 Grail HP 12,623
NP per Hit (%) 0.53%
NP when Attacked (%) 4%
Star Absorption 102
Star Generation per Hit 25.6%

Table of Contents

Servant Skills

Morph (Infiltration) C

Reduces one enemy's critical attack chance for 3 turns.
Reduces their NP gauge by 1.

Show Info
Crit Chance - 10%11%12%13%14%15%16%17%18%20%
CD 9 9 9 9 9 8 8 8 8 7

Available from the start

Unlocks after 1st Ascension

Poisoned Blade C++

Inflicts Poison with 500 damage for 5 turns to one enemy.
Inflicts Toxic Status to one enemy for 5 turns.
(Increases Poison damage on them by 100%.)
Gains critical stars.

Show Info
Stars + 567891011121315
CD 6 6 6 6 6 5 5 5 5 4

Replaces Throwing (Dagger) (via Interlude Quest not available, ETA 2019/11)

Dance of Silence B

Increases own Instant-Kill success rate for 3 turns.
Increases own debuff success rate for 3 turns.

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Death Rate + 20%23%26%29%32%35%38%41%44%50%
Success Rate + 20%23%26%29%32%35%38%41%44%50%
CD 8 8 8 8 8 7 7 7 7 6

Unlocks after 3rd Ascension

Class Skills

Presence Concealment A+

Increase your Critical Star Drop Rate by 11%.

Independent Action A

Increase your Critical Strength by 10%.

Noble Phantasm

Zabaniya (Serenity) C

Inflict Poison of 1000 damage per turn to a single enemy (5 turns).
40% Chance to inflict Skill Seal (1 turn).
40% Chance to inflict NP Seal (1 turn).
Deal significant damage to a single enemy.


Chance to inflict Death on a single enemy.

Show Info

Zabaniya (Serenity)

Delusional Poison Body

Rank Classification Hit-Count
C Anti-Personnel 1

Inflict Poison of 1000 damage per turn to a single enemy (5 turns).
40% Chance to inflict Skill Seal (1 turn).
40% Chance to inflict NP Seal (1 turn).
Deal significant damage to a single enemy.

Level 1 2 3 4 5
900% 1200% 1350% 1425% 1500%
1000 1000 1000 1000 1000
Overcharge Effect

Chance to inflict Death on a single enemy.

Charge 100% 200% 300% 400% 500%
60% 70% 80% 90% 100%
Zabaniya (Serenity) (Upgrade 1) C+

Upgrade via Rank Up Quest 1

Inflict Poison of 2000 damage per turn to a single enemy (5 turns).
40% Chance to inflict Skill Seal (1 turn).
40% Chance to inflict NP Seal (1 turn).
Deal significant damage to a single enemy.


Chance to inflict Death on a single enemy.

Show Info

Zabaniya (Serenity) (Upgrade 1)

Delusional Poison Body

Rank Classification Hit-Count
C+ Anti-Personnel 1
Effect Inflict Poison of 2000 damage per turn to a single enemy (5 turns).
40% Chance to inflict Skill Seal (1 turn).
40% Chance to inflict NP Seal (1 turn).
Deal significant damage to a single enemy.
Level 1 2 3 4 5
1200% 1500% 1650% 1725% 1800%
2000 2000 2000 2000 2000
Overcharge Effect

Chance to inflict Death on a single enemy.

Charge 100% 200% 300% 400% 500%
60% 70% 80% 90% 100%

Assorted Info

ID 124
Cost 7
Gender Female
Growth Semi-Reverse S
Inst. Death Chance 44.00%
Damage Distribution Quick 16,33,51
Damage Distribution Arts 16,33,51
Damage Distribution Buster 10,20,30,40
Damage Distribution Extra 6,13,20,26,35
Damage Distribution NP 100

Attack / HP Growth

Stat Ratings

Interlude Quests

Quest Requirements Reward
Rank Up 1
Chapter Completion:

Ascension: 4

Bond: 0

Interlude (ETA 2019/11)
Chapter Completion: Solomon

Ascension: 3

Bond: 5

Throw (Dagger) C to Poisoned Blade C++

✔ = Available ✖ = Unavailable

Ascension Materials


Skill Enhancement Materials

1 → 2 50,000
2 → 3 100,000
3 → 4 300,000
4 → 5 400,000
5 → 6 1,000,000
6 → 7 1,250,000
7 → 8 2,500,000
8 → 9 3,000,000
9 → 10 5,000,000

Costume Dress Materials

Costume Cost Materials
April Fool's

Bond CE

Bond Level 1 2 3 4 5 6 7 8 9 10
Bond Pts Req. 3,500 8,500 7,000 6,000 2,500 242,500 300,000 280,000 270,000 257,000
Proof of Existence

When equipped on Hassan of the Serenity,
Increase Quick Card effectiveness of all allies by 15% while on the field.

Table of Contents


"Everything, everything, everything as you would will it. I will offer all of myself to you. This body, this heart, all of it…"

The Hassan-i-Sabbah that personifies the infamous Poison Girl hailing from India’s Ancient Age, Serenity employs a variety of methods to debilitate the Master’s foes. Her Arts-focused deck and skills fit well into her image as a saboteur, giving her a unique way to control an enemy’s actions while slowly draining them.

Where most Servants focus more on improving their own damage dealing potential, Serenity focuses on hampering an enemy’s ability to fight effectively. Her NP, Zabaniya, and her Morph (Infiltration), give Serenity multiple ways to stop an enemy from using their own NP thanks to her access to NP Seal and NP Drain. Meanwhile, Serenity has a very small niche in Poison damage to drain her enemy’s HP with, especially after Skill Upgrade adds both Poison and Toxic effects to Thow (Dagger). Lastly, Serenity can generate a decent sum of stars despite her Arts focus as Throw (Dagger) is a potent instant Critical Star generator once it’s leveled, especially given its low cooldown.

Unfortunately, most of the utility potential that Serenity has is not very useful in day-to-day scenarios, and she can be rather unreliable in challenging content as she cannot guarantee the debuffs on her NP land even before factoring in enemy Magic Resistance. DoT effects like Poison are also not very damaging compared to damage steroids in the hands of a Master, even with the improvement that Toxic provides. In general, Serenity’s direct damage potential is lacking, as she does not have a single direct damage boosting buff in her kit, though her NP does have an improved modifier thanks to her NP Upgrade.

In closing, Serenity can work well in Arts-focused teams, providing utility options that synergize with the common Arts supports. This lets her perform especially well in stalling-oriented setups, but outside of stalling she lacks the oomph that would let her succeed in burst damage situations.


Decent Star Generation

Throw (Dagger) can provide a decent number of Critical Stars for its cooldown, and this number gets increased after Serenity’s skill Rank Up. In addition, her active Critical Star Generation is above-average for most Assassins despite her Arts-orientation thanks to the high hit counts and base Star Generation on all her cards.

Moderate Stalling Potential

It’s rare enough to find NP Seal or Skill Seal on a Servant, and Serenity has both. While the base application rate of these Seals are low, they will land reliably while Serenity is under the effects of a leveled Dance of Silence. Furthermore, her NP Drain chance from Morph (Infiltration) is a guaranteed success starting at level 1, unlike many NP Drain skills. With 2 potential ways to stall an enemy NP, Serenity can find a home in most Arts stalling compositions.

Poison Niche

With access to 2 poison effects, and Toxin (which doubles poison damage) on her Skill Upgraded Poisoned Blade, Serenity deals a bit of extra damage over time in stalling compositions. While extremely situational, this niche can find some use during boss fights that feature extreme defensive protections.


Poor Damage Potential

Serenity has quite a few flaws regarding her damage potential: a low Attack stat, Assassin class modifier, a deck that’s not designed for damage, and a lack of damage buffs. While she can indirectly rely on critical hits and she has an NP Upgrade, neither provide enough of a damage boost to make her a competitive DPS option.

Weak Niche

The debuff-heavy kit found in Serenity’s NP and skills has very few cases where it can shine at its utmost. Her NP’s Instant Kill is extremely unlikely to trigger even with the bonus provided by Dance of Silence since it will generally be used against enemies with very low Death Rates. Meanwhile, her poison aspect adds too little damage even after her Skill Upgrade compared to straight damage (de)buffs except against extremely high defense enemies.

Subpar NP Gain

Serenity’s NP generation being on the weaker side for a QQAAB deck not only reduces her overall damage impact, but also her stalling potential. She generally can’t recharge her NP within a 3-turn period, which is problematic as she has to rely on her Dance of Silence to actually make sure her NP Seal lands. With Morph (Infiltration)’s having a 9 turn cooldown at base as well, Serenity’s stalling is heavily frontloaded

Level Up Skill Recommendation

Serenity is in an odd spot where her most important skills, Throw (Dagger) and Dance of Silence, ought to be raised to 10 not just because the reduced cooldown is nice but because those skills are greatly reduced in effectiveness at low levels, to the point that using them at low levels has very little impact on what a Master wants Serenity to do. Conversely, her least important skill to level, Morph (Infiltration), gains very little from additional levels as even the cooldown reduction isn’t very impactful with a base cooldown of 9 turns.

  • Morph (Infiltration) C has strong effects as its NP Drain is already guaranteed, but it scales poorly with levels, only increasing the Critical Rate Down applied to an enemy by +10% from level 1 to 10. This skill is best saved to be leveled after Serenity’s other skills, unless Masters want to use her in stalling compositions, and only worth leveling for the cooldown reduction breakpoints at levels 6 and 10.

  • Throw (Dagger) C scales decently in terms of the Critical Stars it instantly generates, and the potential 4 turn CD is helpful for regularly preparing for crit burst turns. After its Rank Up to Poisoned Blade C++, it can be used to capitalize more on Poison damage. Generally, Serenity’s most impactful skill to raise to 10, and ought to be done first.

  • Dance of Silence B also scales well with levels, though not as well as Throw (Dagger) does. Reducing its downtime and debuff application chance is essential for landing the NP Seal and Skill Seal of Serenity’s NP. It’s fine to raise this skill to 6 along with Throw (Dagger), but level 10 can generally wait unt

Craft Essence Recommendation

While a CE that improves Debuff Success Rate would seem to be a great choice for Serenity, the main problem is that there are very few CEs that provide this sort of buff in any form, let alone to a significant enough degree that equipping for the CE is worth doing in the first place. As such, Serenity is better off using CEs with effects that are universally nice to have: Starting NP Gauge of 50% or more, any sort of long-term damage buff, or Passive Critical Stars/turn.

  • Kaleidoscope / Imaginary Element: Being able to quickly NP means being able to apply the useful NP Seal and Skill Seal debuffs quickly as well, which can be useful in certain Challenging Quests that rely on scripted skill usage.

  • Golden Sumo / Holy Night Supper: These CEs are a nice balance of quickly using her NP and a decent damage buff to make Zabaniya (Serenity) hit for more than a trifling amount of damage.

  • Burning Tale of Love / Record Holder: Either of these CEs provide a large enough Debuff Success Rate to warrant being equipped in the first place. Burning Tale of Love has the added bonus of having a strong passive Anti-Male Special Attack bonus.

  • A Fragment of 2030 / Chocolatier: Either these CEs complement Serenity’s innate ability to provide Critical Stars in an Arts Setup.

  • Formalcraft / Kaleid Sapphire / Projection: The Arts Up provided by these CEs helps Serenity’s NP damage and NP generation from her Arts cards.

Gameplay Tips

NP Seals are powerful debuffs that in practice are a variation of the more standard NP Drain. NP Seals both prevent an enemy from using their NP and stops the normal end-of-turn NP charging every enemy has. Depending on the enemy, Masters thus should not wait for an enemy to have a full NP bar before applying NP Seal.

In that sense, NP Seals are an upgraded version of NP Drains as Masters can still be surprised by enemy NP battery skills after they drain an NP bar. In addition, NP Seals can be applied to full effect even when an enemy has an empty NP bar.

But there is one major drawback to NP Seals: They can be resisted. NP Drains bypass normal resistances, and at 100% success chance, will always “stick” to the target.

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Other Info

Release Date
AKA/Alias/Nicknames Mary
Country/Place of Origin
Illustrator Nakahara
Seiyuu (CV) Senbongi Sayaka



Valentine's CE


Non-Limited - Available in the general summoning pool.

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