Understand Tome of the Eternal Flow
Useful when…
- Boost a Catalyst wielder who deals damage through Charged Attacks.
- Use the Energy restoration when the wielder can regularly reach or refresh three stacks through HP changes.
HP changes create Charged Attack stacks
The 5-star Catalyst has 44.3358 base ATK and CRIT DMG as its secondary stat. Refinement 1 adds 16% HP. Whenever the wielder's current HP increases or decreases, Charged Attack DMG rises by 14% for 4 seconds, up to three stacks; the trigger can occur once every 0.3 seconds. At three stacks, or when the third stack's duration refreshes, it restores 8 Energy. That restoration can occur once every 12 seconds.
Use it with the right damage pattern
The damage bonus is specifically for Charged Attacks, and requires HP to change. A setup that keeps the wielder's HP static will not build stacks merely by attacking. A Thousand Floating Dreams emphasizes Elemental Mastery sharing and party-element-dependent buffs, while Angelos' Heptades grants its party damage and Energy effects after its wielder creates a Shield. Those Catalysts serve different conditions and are not interchangeable by weapon type alone.
Refinement and investment
Refinement 5 raises the HP bonus to 32%, the Charged Attack bonus to 30% per stack, and the Energy return to 12. Refining requires another copy at each step, so the investment is most relevant when both the HP-change trigger and Charged Attack bonus are central to the wielder's use. Ascension is a separate track with Mora and weapon materials listed for example stages.
Stack and Energy limits
Stacks last only 4 seconds and can be triggered no faster than once per 0.3 seconds. Reaching three stacks does not mean Energy returns on every subsequent HP change: the Energy effect has its own 12-second trigger interval. Do not count the Charged Attack bonus toward other attack modes, since the effect names Charged Attack DMG specifically.
Limitations and tradeoffs
- Its damage bonus requires HP to change and applies only to Charged Attacks.
- Energy restoration requires the third stack condition and has a 12-second trigger interval.
- Refinement consumes additional copies of a 5-star Catalyst.
Common mistakes to avoid
- Expecting the HP or Charged Attack effects to build when current HP does not change.
- Treating the 8-to-12 Energy return as available on every HP change.