Mouun’s Moon is a 4-Star Bow that was introduced as part of the Watatsumi series of weapons in Version 2.2 on the Eptiome Invocation event. Mouun’s Moon has a %ATK substat, and a unique passive that powers up the damage of Elemental Bursts based on the energy cost of the user’s entire party. This makes it an attractive choice for characters with high burst costs.
About Mouun’s Moon
| Rarity | ⭐⭐⭐⭐ |
| Weapon Type | Bow |
| Secondary Stat | ATK% |
| Refinement Passive | Watatsumi Wavewalker |
| Region | Inazuma |
| Series | Watatsumi Series |
How to get Mouun’s Moon in Genshin Impact?
Mouun’s Moon is an event exclusive 4 Star weapon and this means that the only way to obtain this weapon is by wishing on a banner which features this weapon. Unlike 5-star event exclusives, there is no true way to guarantee rolling it other than good luck and ample resources.
Upgrades
Ascension and Stats
| Ascension Phase | Level | Base ATK | 2nd Stat (ATK) |
| 0✦ | 1/20 | 44 | 6% |
| 20/20 | 119 | 10.60% | |
| 1✦ | 20/40 | 144 | 10.60% |
| 40/40 | 226 | 15.50% | |
| 2✦ | 40/50 | 252 | 15.50% |
| 50/50 | 293 | 17.90% | |
| 3✦ | 50/60 | 319 | 17.90% |
| 60/60 | 361 | 20.30% | |
| 4✦ | 60/70 | 387 | 20.30% |
| 70/70 | 429 | 22.70% | |
| 5✦ | 70/80 | 455 | 22.70% |
| 80/80 | 497 | 25.10% | |
| 6✦ | 80/90 | 523 | 25.10% |
| 90/90 | 565 | 27.60% |
Ascension Materials
| Items Required | Amount |
| Weapon Ascension Materials | |
| Narukami’s Wisdom | 3 |
| Narukami’s Joy | 9 |
| Narukami’s Affection | 9 |
| Narukami’s Valor | 4 |
| Common Ascension Materials | |
| Dismal Prism | 15 |
| Crystal Prism | 18 |
| Polarizing Prism | 27 |
| Spectral Husk | 10 |
| Spectral Heart | 15 |
| Spectral Nucleus | 18 |
| Total Mora | 150000 |
Refinements
| Refinement | Effects |
| 1 | For every point of the entire party's combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.12%. A maximum of 40% increased Elemental Burst DMG can be achieved this way. |
| 2 | For every point of the entire party's combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.15%. A maximum of 50% increased Elemental Burst DMG can be achieved this way. |
| 3 | For every point of the entire party's combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.18%. A maximum of 60% increased Elemental Burst DMG can be achieved this way. |
| 4 | For every point of the entire party's combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.21%. A maximum of 70% increased Elemental Burst DMG can be achieved this way. |
| 5 | For every point of the entire party's combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.24%. A maximum of 80% increased Elemental Burst DMG can be achieved this way. |
Availability
| Method | Obtainability |
| Paimon’s Bargains | No |
| Crafting | No |
| Overworld | No |
| Events | No |
| Epitome Invocation | Only if featured |
| Wanderlust Invocation | No |
| Character Event Wish | No |
Appearance
Each weapon has two forms, one when it is initially summoned and another once it has reached a certain level of ascension. Once this occurs, the weapon will undergo a change in its design. Mouun’s Moon is a bow with an eye catching mixture of silver, blue and turquoise. Along with its purple handle.
Non-Ascended
Mouun’s Moon has a silver drawstring, as well as being all-silver at its edges
Ascended
The edges of the handle of the bow, as well as the outer edges turn gold. The blue found on the bow is now a darker shade resembling the deep sea.
Story
The longbow once used by the Watatsumi shrine maiden Mouun,
It shines as pure white as the seafoam at the tip of a moonlit wave.
The shrine maiden was friends with the monsters of distant seas, and together they did battle against the thundering clouds for the sake of Watatsumi's transient dream.
The bosom companions rode the waves as one, looming ever in the spray created by the bows of ships...
On and on they went, pursuing the path of no return that Watatsumi was now on until they went together to the land of their tragic obliteration.
"Perhaps it is true that Lord Watatsumi Omikami's war was doomed from the start."
"But as long as we leave these memories behind, as long as we sow the seeds of sacrifice, this might all be worth it."
The songs of the past eulogize the tacit bond she shared with "Umigozen" as twins born of Watatsumi,
And depict them, bow drawn and spear raised, bathing in the wave-spray of a ship's bow...
These distant songs recount how she rode with Touzannou upon the back of a sea creature in the night,
The broken tomorrows she whispered of, gently and mournfully, into the hero's ear...
In yet peaceful days, the twins once sang in chorus with the great whale of the deep sea,
Telling of dismal days spent in the depths and the dark ever-night, and of Omikami and the radiant jade branches.
She once frolicked with that reckless young man, whose only strength was his strength...
"Once I bring that legendary Great Tengu's mask back, you have to keep our promise and finish that business."
"Sure, and if you're still so full of crap then, I'll get a whale to raise a wave large enough to wash that potty mouth of yours clean."
Trivia
-Mouun’s Moon boasts the highest base ATK of any of the 4-Star bows at 44 ATK at level 1 and 565 at level 90.
-The bow originally comes from its owner Mouun, a shrinemaiden hailing from Watatsumi.
FAQs
Is Mouun’s Moon good?
Mouun’s Moon, similarly to the Lithic series, is a situational weapon that demands you be conscientious about how you build your team compositions as well as the type of character holding the weapon. A character needs to have a high damage output burst, as well as a team with a high average burst cost. Unfortunately this makes it rather niche.
How does Mouun’s Moon work?
For every point of the entire party's combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.12%. A maximum of 40% increased Elemental Burst DMG can be achieved this way. The maximum Elemental Burst capacity needed to max out its passive is 333.3 (repeating of course) energy.
Who are good users of Mouun’s Moon?
Kujou Sara stands out as the best user of it, thanks to her very high damage modifiers on her Elemental Burst as well as it being an 80 cost burst that can help maximize the damage of it. She is also commonly run in teams with the Raiden Shogun, who also desires characters with high energy costs to maximize her Elemental Burst damage.
Final Thoughts
Mouun’s Moon suffers a lot from its niche optimal use cases as well as poor availability due to being a unique weapon only available on the Epitome Invocation wishes. Even for its best case users and uses, it doesn’t clearly outclass its competition enough to justify the use of it unless it is at high refine levels.
