Tome of the Eternal Flow – How to get, Ascension, stats, and who can use it in Genshin Impact

Tome of the Eternal Flow is a Genshin Impact five-star catalyst with a unique value proposition. While it has DPS-boosting stats, its passive increases the wielder's HP and increases Charged Attack Damage whenever their HP increases or decreases. Few characters can take advantage of this weapon's full effect, so it's definitely not a free-to-play pick. Regardless, here's everything you need to know about the Tome of the Eternal Flow.

How to get the Tome of the Eternal Flow in Genshin Impact

Tome of the Eternal Flow is a limited weapon that can only be obtained whenever it's featured on rate-up in the Epitome Invocation banner, which you can pull on using Primogems and Intertwined Fates. As such, you need to wait for it to go on rotation and chart an Epitomized Path to guarantee Tome of the Eternal Flow at the third pity.

Tome of the Eternal Flow stats

• Base Attack: 44 to 542
• Substat: Crit Damage (19.2 to 88.2%)
• Passive: Aeon Wave
  • HP is increased by 16/20/24/28/32%. When current HP increases or decreases, Charged Attack Damage will be increased by 14/18/22/26/30% for four seconds. Max three stacks, can be triggered once every 0.3 seconds. When you have three stacks or refresh a third stack's duration, eight Energy will be restored. This Energy restoration effect can be triggered once every 12 seconds.

Related: Skyward Atlas – How to get, Ascension, stats, and who can use it in Genshin Impact

Genshin Impact Tome of the Eternal Flow Ascension Cost & Materials

Below are all the Ascension materials necessary to raise Tome of the Eternal Flow to Ascension level six, which can be farmed from the following sources:

• Gears: Clockwork Meka in Fontaine
• Cores: Breacher Primus in Fontaine
• Mask: Echoes of the Deep Tides (Tuesday, Friday, Sunday)

Ascension Phase One

x10,000 Mora

x3 Meshing Gear

x5 Rift Core

x5 Dross of Pure Sacred Dewdrop

Ascension Phase Two

x20,000 Mora

x12 Meshing Gear

x18 Rift Core

x5 Sublimation of Pure Sacred Dewdrop

Ascension Phase Three

x30,000 Mora

x9 Mechanical Spur Gear

x9 Foreign Synapse

x9 Sublimation of Pure Sacred Dewdrop

Ascension Phase Four

x45,000 Mora

x14 Mechanical Spur Gear

x18 Foreign Synapse

x5 Spring of Pure Sacred Dewdrop

Ascension Phase Five

x55,000 Mora

x9 Artificed Dynamic Gear

x14 Alien Life Core

x9 Spring of Pure Sacred Dewdrop

Ascension Phase Six

x65,000 Mora

x18 Artificed Dynamic Gear

x27 Alien Life Core

x6 Essence of Pure Sacred Dewdrop

Who can use Tome of the Eternal Flow in Genshin Impact?

Tome of the Eternal Flow has a niche use case as it requires the wielder's HP to constantly go up and down to obtain the Charged Attack bonus. Currently, only Neuvillette is able to manipulate his HP naturally through skills. Others would have to go shield-free and constantly get attacked and healed to take advantage of the weapon's passive. With that said, I only recommend giving Tome of the Eternal Flow to Neuvillette for ease of use.

For more five-star catalyst options, check out Jadefall’s Splendor – How to get, Ascension, stats, and who can use it in Genshin Impact here on Pro Game Guides.