Character EXP materials are essential for leveling characters in Genshin Impact.
You can obtain them from events, quests, exploration, the Battle Pass, and other sources, but building several characters can quickly consume even a large supply.
When that happens, Blossom of Revelation Ley Lines provide a repeatable way to farm Character EXP materials using Original Resin.
But is spending Resin on EXP books actually worth it?
The short answer is:
Yes. EXP Ley Lines are worth farming when character levels are preventing an important upgrade or when you are preparing a character you genuinely plan to build. However, there is usually little reason to continuously farm EXP books when you already have enough for your current goals.
The value of EXP Ley Lines depends on which characters you are building and how important additional levels are for those characters.
1. What Is an EXP Ley Line?
EXP Ley Lines are officially called Ley Line Outcrops: Blossom of Revelation.
They appear as blue Ley Line icons on the map.
After defeating the enemies spawned by the Ley Line, you can spend Original Resin to claim Character EXP materials.
These materials are used to increase character levels.
Unlike exploration rewards or event rewards, Ley Lines provide a repeatable source whenever you need additional EXP.
2. What Does an EXP Ley Line Give You?
Blossoms of Revelation primarily reward Character EXP materials.
At higher World Levels, the rewards include:
- Hero’s Wit
- Adventurer’s Experience
The exact reward improves as your World Level increases until reaching the highest reward tier.
Like Mora Ley Lines, the important advantage is predictability.
You are not gambling for a particular Artifact.
You spend Resin and receive resources that directly contribute toward character leveling.
3. Is Spending Resin on EXP Books a Waste?
No.
If Character EXP is preventing you from leveling an important character, farming EXP books is a legitimate use of Resin.
The idea that Resin should only be spent on rare materials or Artifacts can be misleading.
Suppose you already have:
- Ascension materials
- Talent materials
- Enough Mora
- A leveled weapon
but your character is still underleveled because you have no EXP books.
Your bottleneck is Character EXP.
An Artifact Domain does not solve that.
A Blossom of Revelation does.
4. When Should You Farm EXP Ley Lines?
Farm EXP materials when you have a specific character-leveling goal.
For example:
- Your main damage dealer needs additional levels
- A reaction trigger benefits strongly from character level
- You need to reach the next ascension point
- You recently obtained a character you plan to use
- You are preparing a second team
- You are pre-farming a confirmed character
In these situations, EXP Ley Lines provide guaranteed progression toward a clear goal.
5. When Should You NOT Farm EXP Ley Lines?
You usually do not need to farm EXP books just because you have spare Resin.
If you already have enough Character EXP materials for the characters you currently plan to build, another resource may provide more immediate value.
That could include:
- Ascension materials
- Talent books
- Weapon materials
- Mora
- Artifacts
- Weekly Boss materials
The question should not be:
“Will I eventually need EXP books?”
You almost certainly will.
The better question is:
“Do I need more EXP books for my current or near-future characters?”
6. Do All Characters Need to Reach Level 90?
No.
This is where EXP farming becomes more complicated.
Taking a character from Level 80 to Level 90 requires a substantial amount of EXP materials and Mora.
For some characters, that investment can be very valuable.
For others, the improvement may be relatively modest compared with upgrading another part of the team.
So before farming large quantities of EXP books, determine whether the character actually benefits enough from additional levels.
7. Which Characters Benefit More From Level 90?
Character level is particularly important for certain types of damage.
Transformative Reaction damage scales significantly with the level of the character triggering the reaction.
This can make Level 90 especially valuable for characters responsible for reactions such as:
- Hyperbloom
- Burgeon
- Swirl
- Bloom
- Overloaded
Characters whose damage scales strongly with HP or DEF can also sometimes gain more from additional levels because those base stats increase with character level.
This means Level 90 can be much more valuable for some characters than others.
8. When Is Level 80 Enough?
Many characters can perform their role effectively without immediately reaching Level 90.
For example, a support whose primary purpose is:
- Applying an element
- Providing a buff
- Healing
- Generating Energy
- Activating an Artifact set effect
may have other upgrades that deserve priority first.
Likewise, some ATK-scaling damage dealers may gain more immediate value from:
- Weapon levels
- Talent levels
- Better Artifacts
than from rushing the final ten character levels.
That does not mean Level 90 is useless.
It means its priority depends on the character.
9. Ascension and Leveling Are Not the Same Thing
It is important to separate:
Ascending a character
from
leveling that character all the way to 90.
The final ascension can unlock:
- Higher Talent level caps
- Additional ascension stat growth
- The ability to continue leveling
Because of this, ascending a character can be valuable even if you do not immediately take them to Level 90.
You can ascend first and decide later whether the additional EXP investment is worth it.
10. Reaction Characters Change the Calculation
Suppose you are building a character whose main job is triggering Hyperbloom.
Their reaction damage depends strongly on:
- Character level
- Elemental Mastery
- Relevant enemy resistance
Traditional offensive stats such as ATK and CRIT may not be the main priority for that reaction damage.
In this case, farming EXP materials to reach Level 90 can provide a much more meaningful improvement than it would for some conventional characters.
This is why one universal leveling rule does not work for every account.
11. Should Your Main DPS Reach Level 90 First?
Not automatically.
Your main DPS is often one of your most heavily invested characters, but that does not mean Level 90 should always be the next upgrade.
Check whether they still need:
- Important Talent levels
- Weapon levels
- Ascension
- Functional Artifacts
If those upgrades provide more value, complete them first.
On the other hand, if your character strongly benefits from level scaling and the rest of the build is already established, Level 90 may be a sensible next investment.
12. What About Support Characters?
Do not assume every support should remain at a low level forever.
Some supports benefit substantially from character levels.
For example, their abilities may scale with:
- HP
- DEF
- Character level
- Reaction damage
Others may primarily need enough levels to unlock important ascensions and Talents.
Judge each support by how their kit works rather than using a universal rule such as:
“DPS characters Level 90, supports Level 70.”
That can lead to inefficient investment.
13. Should Beginners Farm EXP Ley Lines?
Beginners can farm them when necessary, but should generally avoid building huge EXP reserves without a reason.
Early progression naturally provides Character EXP materials from:
- Quests
- Exploration
- Events
- Adventure Rank rewards
- Other progression systems
If those resources are enough to maintain your core team, continue using them.
But if your main character cannot keep up with the current progression because you have run out of EXP materials, farming a Blossom of Revelation is perfectly reasonable.
14. Higher World Levels Make EXP Ley Lines More Efficient
Ley Line rewards improve as your World Level increases until reaching their maximum reward tier.
This means newer players generally have less reason to aggressively stockpile EXP materials far in advance.
If you do not currently need them, waiting until later progression can make your Resin more efficient.
However, do not intentionally leave an important character severely underleveled just to save Resin for the future.
Current progression still matters.
15. EXP Ley Lines vs Mora Ley Lines
Character leveling requires both EXP materials and Mora.
So before farming either one, check your inventory.
Suppose you have:
Plenty of Hero’s Wit + almost no Mora
Farm Mora.
If you have:
Millions of Mora + almost no EXP materials
Farm EXP.
If both are low, calculate what your next character upgrade actually requires and farm accordingly.
There is little value in accumulating one resource when the other is preventing you from using it.
16. EXP Ley Lines vs Artifact Domains
Suppose you are deciding between leveling a character and farming better Artifacts.
Ask how developed the character already is.
If they are significantly underleveled and their level meaningfully affects their damage or survivability, EXP provides guaranteed progress.
Artifact farming only provides a chance at an improvement.
But once the character is already at an appropriate level, Artifacts may become the better long-term investment.
The answer changes as the build develops.
17. EXP Ley Lines vs Talent Domains
This is another common Resin decision.
If a character is already at a reasonable level but has important Talents sitting at low levels, Talent materials may provide more value.
On the other hand, a transformative reaction trigger may benefit greatly from reaching a higher character level even if their Talents are not especially important.
Again, look at how the character actually deals damage or performs their role.
Do not blindly apply the same farming order to everyone.
18. Should You Farm EXP for Characters You Might Build Later?
Usually, confirmed plans should come first.
EXP books are universal, so they are less risky to pre-farm than character-specific boss materials.
Even if your plans change, the EXP books can be used on someone else.
However, Resin still has an opportunity cost.
If your current team needs important upgrades, farming hundreds of Hero’s Wit for hypothetical future characters may not be the best priority.
Build your current account before over-preparing for uncertain plans.
19. Should You Farm EXP Before Pulling a New Character?
If you are confident you will obtain and build the character, yes.
Character EXP is one of the safest resources to pre-farm because it is not tied to one specific character.
Preparing enough EXP materials beforehand allows you to level the character immediately after obtaining them.
But remember that a complete build also requires:
- Mora
- Ascension materials
- Talent materials
- Boss materials
- Weapon resources
Having enough Hero’s Wit alone does not finish the character.
20. How Much EXP Should You Keep in Reserve?
There is no universal number.
Your ideal reserve depends on:
- How frequently you build new characters
- How developed your account is
- Whether you pull frequently
- Upcoming characters you want
- How much Resin you are willing to spend later
Instead of choosing an arbitrary number of Hero’s Wit, think in terms of:
“Do I have enough to build the next character I actually plan to use?”
That creates a practical target.
21. Can You Get Character EXP Without Resin?
Yes.
Character EXP materials are available from many sources, including:
- Events
- Quests
- Exploration
- Chests
- Battle Pass rewards
- Serenitea Pot rewards
- Various regional systems
These sources can significantly reduce how often you need EXP Ley Lines.
However, many are limited or non-repeatable.
When you need a large amount of Character EXP immediately, Blossom of Revelation remains the straightforward repeatable option.
22. What If You Are Constantly Running Out of EXP Books?
The problem may be that you are building too many characters simultaneously.
Taking every newly obtained character to a high level can consume enormous amounts of EXP.
Instead, prioritize:
Core team → Second team → Specialized characters → Optional characters
You can always expand your roster later.
A smaller group of properly developed characters is usually more useful than a large collection of partially leveled characters.
Simple EXP Ley Line Priority Guide
Farm EXP Ley Lines When:
- Character EXP is blocking an important upgrade
- You are leveling a character you actively use
- A reaction trigger needs higher character levels
- You are preparing a confirmed new character
- Your EXP reserves are genuinely low
Usually Wait When:
- You already have enough EXP for current plans
- More important ascensions or Talents are unfinished
- You are farming only for hypothetical future characters
- You are leveling characters you rarely use
Consider Level 90 More Strongly For:
- Transformative reaction triggers
- Characters that benefit strongly from HP or DEF growth
- Important characters whose builds are otherwise well developed
So, Are EXP Ley Lines Worth Farming?
Yes—when Character EXP is something you actually need.
Blossoms of Revelation provide guaranteed progression.
If a character needs additional levels and you do not have enough EXP materials, spending Resin on the Ley Line directly solves that problem.
But there is no reason to continuously farm EXP books simply because they will eventually be useful.
Your Resin should address your current or near-future progression goals.
Final Advice
EXP Ley Lines are neither a waste of Resin nor something every player needs to farm constantly.
Their value depends on your roster.
Before farming, decide which character you are leveling and why that character needs additional levels.
For some characters, reaching Level 90 can provide an important damage increase—especially when character level strongly affects their reactions or scaling.
For others, weapon levels, Talents, or Artifacts may deserve priority first.
Farm Character EXP when levels are your bottleneck. Stop when you have enough for your actual plans, and move your Resin to the next upgrade that matters.
