The First Descendant Blue Beetle build guide: Best Modules and Unique trait explained

The Blue Beetle is one of The First Descendant’s powerful Ultimate Scout Rifles. A solid weapon with the incredible Arcane Wave unique ability, it’s designed for players that use a lot of Singular and Fusion abilities. Either way, it will have a chance to trigger a useful ability: Arcane Energy or Purification. It’s a weapon that takes a long time to grind for, much less unlock, but it will be worth it if it fits your playing style.

Quite a few characters use Fusion or Singular abilities, such as Esiemo or Gley. Keeping that in mind, this could be a weapon you find yourself using on either of those characters, depending on your preferred gun and playstyle.

If you want to unlock Blue Beetle in The First Descendant, here’s how, what to slot into it, and what its special ability does.

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How to unlock Blue Beetle in The First Descendant

It doesn't fire fast, but Blue Beetle sure does hit hard (Image via Nexon)

The Blue Beetle requires a lengthy grind in The First Descendant for parts, in addition to a Rank 10 Mastery. You will also need 100,000 gold and real-world research time for the full gun after researching the parts.

It’s going to take a while to get this gun, but its stats, combined with its unique ability make it a worthwhile addition to any player’s library of weaponry. Here’s what you need to unlock this gun:

Blue Beetle Blueprint (one of the following locations)

• Intercept (Common): Dead Bride (Amorphous Material 023)
• Intercept (Hard): Dead Bride (Amorphous Material 069)
• Intercept Battle (Hard): Pyromaniac (Amorphous Material 086)
• Intercept Battle (Hard): Molten Fortress (Amorphous Material 127)

Blue Beetle Nano Tube

• Metal Accelerant x130
• Monomolecular Extractor x125
• Compound Carbon Activator x7
• Blueprint from:
• Intercept Battle (Common): Executioner (Amorphous Material 019)
• Agna Desert (Normal): Void Fusion Reactor - Agna Desert Vermillion Waste complete
• Fortress (Hard): Abyssal Void Fusion Reactor - Fortress Frozen Valley complete
• White-night Gulch (Hard): Abyssal Void Fusion Reactor - White-night Gulch Hatchery complete

Blue Beetle Polymer Syncytium

• Superfluid x143
• Flectorite x73
• Anode Ion Particle x7
• Blueprint from:
• Intercept Battle (Common): Stunning Beauty (Amorphous Material 010)
• Vespers (Hard): Abyssal Void Fusion Reactor - Vespers Ruins complete
• Agna Desert (Hard): Abyssal Void Fusion Reactor - Agna Desert Miragestone Deposit complete
• Hagios (Normal): Void Fusion Reactor - Hagios Fractured Monolith complete

Blue Beetle Synthetic Fiber

• Semi-permanent Plasma x72
• Shape Memory Alloy x115
• Synthesized Artificial Biometal x25
• Blueprint from:
• Intercept Battle (Common): Dead Bride (Amorphous Material 025)
• Intercept Battle (Hard): Devourer (Amorphous Material 077)
• Intercept Battle (Hard): Swamp Walker (Amorphous Material 094)
• White-night Gulch (Normal): Void Fusion Reactor - White-night Gulch Hatchery complete

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Best Blue Beetle build for The First Descendant

Here are the ideal Blue Beetle mods for maximum effect (Image via Nexon)

While working on this gun, you will also be able to use Weapon Readjustment to change its starts. One of the better picks for this gun is Chill ATK, as you have a chance to completely stop enemies dead in their tracks, allowing you to continue shooting away at them.

When considering a loadout for the Blue Beetle in The First Descendant, we wanted Firearm ATK, Critical Hit Rate, Fire Rate, and Chill Elemental mods. This gives a ton of synergy and plenty of damage to whatever you’re aiming at. That means mods like Rifling Reinforcement, Chill Priority, Snowflake Conductor, and Chill Enhancement.

• Rifling Reinforcement
• Anti-matter Round
• Marksman
• Chill Enhancement
• Snowflake Conductor
• Better Concentration
• Better Insight
• Fire Rate UP
• Weak Point Sight
• Chill Priority

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Blue Beetle Unique ability explored in The First Descendant

Both of Blue Beetle's abilities are fantastic (Image via Nexon)

Arcane Wave is Blue Beetle’s unique ability in The First Descendant. When using a Fusion Skill, it grants the unique ability Arcane Energy, with a set chance. When using a Singular skill, it grants you the unique ability Purification, also with a set chance. However, what do those actually mean?

Arcane Energy grants Skill Critical Hit Rate chance. If you swap guns while the buff is available, the buff disappears. To help with this, you could get a new Reactor with Blue Beetle mounting on it. On the other hand, you have Purification, which immediately removes all debuffs from you when using Singular skills. Admittedly, you do need to use a Singular skill to trigger it, but you have an on-demand cleanse, and that’s incredible.

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Check out our other The First Descendant guides

• 5 things you should know before you start The First Descendant
• The First Descendant Enduring Legacy build guide
• The First Descendant character tier list