AI Limit Guide | Lightning Antihalation Build

The Lightning Antihalation build is insane, and this guide shows you how to use it in AI Limit.

Game Guide by Ornstein on May 13, 2025

You’ll use an end‐game build centred around the Arbiter and the EX-Railgun gun. This build becomes available once you defeat the Lost Kid boss. While it may feel less exciting than finding early‐game synergies, it delivers unmatched power in New Game Plus and beyond.

Obtaining the Build

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You unlock the Lightning Antihalation build by defeating the Lost Kid boss. Once you’ve beaten this boss, you’ll acquire the Lost Spear Arbiter and the EX-Railgun gun. These items form the core of your end‐game strategy.

Weapon Overview

The Lost Spear Arbiter draws lightning from memories stored within the spear. You can jump, draw lightning at the tip, and then slash downward to shock enemies in all directions. After that, you unsheathe the sword inside the Arbiter and perform continuous chops. The combination of aerial lightning strikes and rapid slashes makes this weapon extraordinarily powerful once fully upgraded.

Armor and Equipment

You’ll pair the Arbiter and EX-Railgun gun with top‐tier end‐game armour. The Guardian Helmet offers excellent protection, and the rest provides high defence and versatility. In situations requiring specialized resistance—such as fire or poison—you can swap pieces accordingly, but generally, this set excels in most encounters.

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Seal Recommendation

To maximize stability and manage sync rate, equip the Seal of the Tree. High stability reduces the sync rate increase you suffer when hit, allowing you to maintain a tier 1 state longer. If you prefer a different balance, choose a seal that fits your playstyle, but ensure it offers enough stability to keep your combo going under pressure.

Gameplay and Combo Execution

Your basic combo begins with a jump lightning attack, followed by charging the Arbiter’s power. This releases a massive arc that staggers enemies, letting you jump again and repeat as long as you have pure crystals. Pure crystals regenerate in New Game Plus, so you’ll never run out. The EX-Railgun gun lets you stagger foes quickly between Arbiter casts, seamlessly extending your combo.

Stability, Vitality, and Sync Rate

Invest in vitality to boost your health and conversion rate—how much sync rate you gain from melee hits. High stability decreases sync rate buildup when damaged. Aim for a balance that lets you endure hits without dropping below tier 1. This ensures you can immediately continue your lightning combo rather than being forced to recover.

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Boss Fight Strategy

Against bosses like “Horsey,” start with a stagger combo using your EX-Railgun gun, then unleash the Arbiter sequence. Parrying adds stun, letting you chain more slashes. Even if you take damage, your stability seal keeps your sync rate manageable. Pop pure crystals to restore sync rate on the fly and stay in tier 1 throughout the fight.

Final Notes

This Lightning Antihalation build offers phenomenal power late in the game. Focus on high stability and vitality to maintain your combo, and leverage pure crystals to keep the sync rate in check. Once you master the Arbiter-EX-Railgun sequence, you’ll dominate any boss in New Game Plus and beyond.

Also, check our in-depth AI LIMIT Review and other guides below: