In AI Limit, Nuclei are among the most valuable and versatile resources you can obtain. These powerful cores, harvested from formidable bosses, serve dual purposes: they can enhance your character’s stats or be exchanged for unique, high-tier weapons. If you're familiar with Soulslike games, you’ll recognize the importance of boss drops—but AI Limit adds its own twist to the formula.
This guide will cover everything you need to know about Nuclei, including how to obtain them, their stat-altering effects, and the best ways to utilize them for maximum benefit.
What Are Nuclei in AI Limit?
Nuclei are the crystallized essence of powerful boss-type enemies in AI Limit. When equipped, they modify your character’s attributes, providing passive bonuses that can significantly impact gameplay. Each Nucleus affects three key stats:
Absorption Rate – Determines how many Crystals (the game’s primary currency) you earn from defeating enemies. A higher Absorption Rate means more resources per kill.Retention Rate – Controls how many Crystals you retain upon death. In a punishing game like AI Limit, losing fewer resources when dying can be a lifesaver.Energy Absorption – Influences how much Mud Energy (Sync Rate) you gain from defeating enemies. Note that this does not affect energy gained from basic attacks.Since each Nucleus offers different stat distributions, choosing the right one for your playstyle is crucial. Some may favor aggressive builds with faster energy gain, while others might help farming-focused players maximize Crystal income.
How to Obtain Nuclei
Most major bosses drop a Nucleus upon defeat. However, there are exceptions—some enemies, like the 
Three-Faced Pardoner or the 
Saint, may drop powerful equipment instead. While these alternate rewards can be excellent, Nuclei remain highly sought-after due to their versatility.
Key Bosses Known to Drop Nuclei:
- Cleansing Knight (Early-game boss)
- Hollow Conqueror (Mid-game encounter)
- Eclipse Watcher (Late-game challenge)
If you’re hunting for Nuclei, prioritize defeating these foes. Be warned, though: in a single playthrough, you 
cannot obtain duplicate Nuclei from the same boss, so choose wisely when trading or equipping them.
How to Use Nuclei: Equipping vs. Trading
Once you have a Nucleus, you have two primary options:
1. Equipping for Stat Bonuses
- Open your inventory and select the Nucleus to equip it.
- Experiment with different Nuclei to find the best stat boosts for your build.
- Some Nuclei may synergize better with certain weapons or playstyles (e.g., high-energy regeneration for spellcasters).
2. Trading for Boss Weapons
The real power of Nuclei lies in their ability to be exchanged for unique boss weapons. To do this, you must progress until you reach the Underground Parish, the area following the Cleansing Knight fight.
Steps to Trade Nuclei:
Reach the Underground Parish – After defeating the Cleansing Knight, proceed to this new zone.Locate the Branch (Checkpoint) – Activate it to ensure you can respawn nearby.Find Dr. Adrammalech – He resides in a hallway with his robotic assistant, Assis.Speak to the Doctor – He will offer to trade your Nuclei for powerful weapons.- If you refuse, you can still interact with Assis for alternative exchanges.
Trading Costs:
- 1 Boss Nucleus (specific to the weapon you want)
- Several Thousand Crystals (varies depending on the weapon)
Since you can’t farm duplicate Nuclei in one playthrough, think carefully before trading. Some boss weapons may be game-changers for your build, while others might not suit your playstyle.
Should You Sell Nuclei for Crystals?
While selling a Nucleus grants a substantial amount of Crystals, it’s not recommended unless you’re absolutely certain you won’t need it. The weapons andstat boosts they provide are far more valuable in the long run.
Final Tips for Nucleus Management
- Experiment with equipped Nuclei to find the best stat adjustments for your build.
- Prioritize boss fights that drop Nuclei if you’re aiming for powerful trades.
- Plan your trades carefully—once a Nucleus is exchanged, you can’t get it back until New Game+.
- Avoid selling Nuclei unless you’re desperate for Crystals.
By mastering Nuclei usage, you’ll gain a significant edge in AI Limit, whether through enhanced stats or devastating boss weapons. Choose wisely, and dominate the battlefield!
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