Nilou's signature weapon in Genshin Impact, the Key of Khaj-Nisut sword, is going to come out during the second phase of Genshin Impact 3.1. It is a powerful weapon for sword users whose abilities scale based on HP.

In this article, Gurugamer is going to showcase everything you need to know about the Key of Khaj-Nisut, including its stats and users.

Key of Khaj-Nisut stats & skill

The Key of Khaj-Nisut is the only weapon so far in Genshin with HP% sub stat, on top of the 20% bonus MAX HP from its skill. At the max level, it gives the user an extra 86.15% MAX HP.

Skill: HP increased by 20/5/30/35/40%. When an Elemental Skill hits opponents, you gain the Grand Hymn effect for 20s. This effect increases the equipping character’s Elemental Mastery by 0.12/0.15/0.18/0.21/0.24% of their Max HP. This effect can trigger once every 0.3s. Max 3 stacks. When this effect gains 3 stacks, or when the third stack’s duration is refreshed, the Elemental Mastery of all nearby party members will be increased by 0.2/0.25/0.3/0.35/0.4% of the equipping character’s max HP for 20s.

Should you pull on the 3.1 weapon banner?

If you are planning on getting Nilou, going for the 3.1 weapon banner is a good idea. The Key of Khaj-Nisut is pretty much designed for her - it is a crazy stat stick that gives massive HP and EM bonuses.

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One of a paired set of scepters fashioned from obsidian. They say that this can be used as a key to open the gate to a paradise that lies at the end of the ocean of sand.

Primordial Jade Cutter is also great on Nilou or any other DPS sword user.

Upgrade materials

20→40 Copper Talisman of the Forest Dew x5 Damaged Prism x5 Faded Red Satin x3
40→50 Iron Talisman of the Forest Dew x5 Damaged Prism x18 Faded Red SatinFaded Red Satin x12
50→60 Iron Talisman of the Forest Dew x9 Turbid Prism x9 Trimmed Red Silk x9
60→70 Silver Talisman of the Forest Dew x5 Turbid Prism x18 Trimmed Red Silk x14
70→80 Silver Talisman of the Forest Dew x9 Radiant Prism x14 Rich Red Brocade x9
80→90 Golden Talisman of the Forest Dew x6 Radiant Prism x27 Rich Red Brocade x18

Which are the best users of Key of Khaj-Nisut?

Nilou should be able to deal some crazy amount of damage using this weapon.


It is the signature weapon for Nilou who focuses on Bloom combo (Elemental Mastery) and scale on HP (MAX HP substat).


Ayato's Skill gives his normal attacks bonus damage based on his MAX HP. Key of Khaj-Nisut would increase it significantly.


The new character in 3.2, Layla, has her whole skill set based around max HP. With the Key of Khaj-Nisut, she would be able to shield very efficiently and deal much more damage.

Kuki Shinobu

Kuki's heal and damage are based on her own HP - the more HP you have, the better. It is unlikely that Kuki would ever get this weapon if you have Nilou.

>>> Read more: Genshin Impact: 3 Reasons To Pull For Nilou (And 3 Reasons To Skip Her Banner)