While its brothers, the X-1 and X-2, laid the groundwork for the “Miniature MS” era in the game, the X-3 arrives as a powerhouse that trades the safety of the ABC Mantle for sheer, overwhelming raw power.

Here is everything you need to know about the “Skull Heart” and how to pilot it to victory in the 750-cost environment.

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The Stats: A 750-Cost Apex Predator

The X-3 enters the game as a 750 Cost Raid unit, designed to hunt down the most fortified supports and generals alike.

• HP & Armour: Boasting high HP for its size, it lacks the Anti-Beam Coating Cloak but compensates with localised defence.
• Mobility: It is exceptionally nimble. With the Flap Booster and Forced Injector skills, the X-3 can stay airborne or dance through a crowded battlefield with ease.
• Skill Highlight: Heavy Attack Kai: This new skill allows the X-3 to charge and unleash its heavy attack even while mid-air, making aerial ambushes its signature move.

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Weaponry: The Muramasa Blaster

The X-3 is defined by its iconic Muramasa Blaster, a weapon that functions as both a high-output beam rifle and a terrifying “chainsaw” of 14 beam sabres.

Weapon	Type	Combat Utility
Muramasa Blaster (Gun)	Ranged	An instant-stagger beam shot with high damage. Ideal for initiating.
Muramasa Blaster (Melee)	Melee	Massive reach and priority. Its heavy attack is a devastating multi-hit combo.
I-Field Hand	Defensive/Sub	A unique sub-weapon that nullifies incoming ranged beam damage from the front while active.
Chest Gatling Cannons	Sub	An instant-stagger beam shot with serious damage. Ideal for initiating.
Scissor Anchor	Sub	Classic Crossbone tech used to stun and pull enemies into your melee range.

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Unique Gameplay Mechanic: Max Output (T)

Like the other Crossbone units in GBO2, the X-3 features a specialised transformation/buff mode. By dealing melee damage, you fill a Skill Gauge. Pressing the touchpad button activates Max Output (T):

• Full Repair: Instantly recovers HP for your Head, Back, and Leg parts.
• Enhanced Performance: Drastically increases attack power, movement speed, and thruster efficiency.
• I-Field Overdrive: Your I-Field Hand lasts longer and becomes more effective at absorbing incoming fire.
• Shield Piercing: Melee attacks during this mode penetrate enemy shields and nullify certain defensive buffers.

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Pro Tips for the “Skull Heart”

To make the most of Tobia Arronax’s signature machine, keep these tactics in mind:

1. The Aerial Menace: Use your Flap Booster to gain height, then charge your Heavy Attack Kai while descending. Most players don’t look up until it’s too late.
2. I-Field Timing: Don’t just hold the I-Field. Use it to close the gap against Beam-heavy Generals (like the Nu Gundam or Unicorn). It negates the stun, letting you walk right through their primary fire.
3. Combo Extension: The X-3 can chain its Muramasa Blaster into its Heat Daggers. A common high-damage string is: Stagger (Gun) -> Downswing (Blaster) -> Dagger follow-up -> Anchor -> Finisher.
4. Manage the Gauge: Don’t pop Max Output the second it’s ready. Wait until your legs are damaged or you are about to engage in a decisive 1v1 to maximise the “part repair” benefit.

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Final Verdict

The Crossbone Gundam X-3 is arguably the most aggressive unit in the game’s current 750 meta. It requires a pilot who isn’t afraid to get messy in close quarters but has the discipline to manage its unique I-Field defences.

MOBILE SUIT GUNDAM BATTLE OPERATION 2 – Crossbone Gundam X-3 – https://en.gundam.info/

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