Machine Assassin is a type of Attacker class in Xenoblade Chronicles 3 and is the default class of Segiri. Read on to learn more about the class, including its best arts, skills, characters, accessories, and gems, as well as find out how to unlock the class.

Machine Assassin Class Overview

Machine Assassin Basic Information

Class		Role	Default Character
Machine Assassin		Attacker	Segiri
Attack	Defense	Health	Support
A	C	D	A
Description
An Attacker who hounds foes with debuffs, then fells them at their most vulnerable with dual axes.

Character Class Rating

Noah	Mio	Eunie
A	C	B
Taion	Lanz	Sena
B	D	S

Class Rating is the speed at which each character ranks up an individual class, so the lower their Class Rating, the slower it takes for them to rank up the class.

How to Unlock Machine Assassin

Recruit Segiri by Completing Their Hero Quest

Machine Assassin is the default class of Segiri, a hero in Xenoblade Chronicles 3. To unlock this class and equip it to your main characters, you must first complete their Hero Quest: Inhumanity.

Inhumanity Walkthrough

Complete Invisible Bond to Unlock Rank 20

After you unlock this class, it will have a rank cap of 10, so you are unable to upgrade its Arts and skills further than that rank. To break the rank cap and extend the limit up to Rank 20, you must first complete the quest Invisible Bond.

Invisible Bond Walkthrough

Best Machine Assassin Characters

Recommended Characters
Sena	Eunie

Characters with high Attack that also make excellent Support characters like Sena and Eunie are best for Machine Assassins. Having decently high Dexterity is also a preferred attribute as it allows them to land more of their attacks.

Best Machine Assassin Arts

Recommended Combat Arts

Art	Attack Type	AoE	Base Effect
Fatal Bite	Physical Attack	One Target	Boosts damage dealt when attacking from the side by 100%.
Terror Onslaught	Physical Attack	One Target	Inflicts Resistance Down when Art hits enemy rear.
Havoc Slayer	Physical Attack	Frontward AOE	When an attack hits, spreads target's debuffs to other enemies in range.

The Machine Assassin class focuses on inflicting debuffs on your enemies to increase your damage and to aid your allies in taking them down. The more debuffs you can inflict on more enemies, the better.

For recommended Combat Arts, Terror Onslaught is the preferred debuff-inflicting Art while Havoc Slayer can spread it around to all enemies in the area. Fatal Bite is a strong attack which you can use to inflict the most damage to enemies.

Recommended Master Arts

Rank 1 and 10 Master Arts

Art	Base Effect	Class Rank
Maximum Voltage	Unblockable / Atk. Up	Ogre Rank 10
Spearpoint Thrust	Bind	Thaumaturge Rank 10
No Love Lost	Physical Def. down	Strategos Rank 1

Since Machine Assassins excel at inflicting and spreading debuffs on enemies, the best Master Arts add more debuff-inflicting Arts to their arsenal. Maximum Voltage is also recommended to increase your damage and ensure that your enemies do not block your debuffs.

Rank 20 Master Arts

Art	Base Effect	Class Rank
Sword of Valor	Damage link	Yumsmith Rank 20
Empyrean Salvo	AOE / Blaze / Awakened+	Seraph Rank 20

Though the Talent Art of this class already excels at inflicting debuffs on your opponents, the debuffs inflicted are random. If you would rather inflict a specific debuff on enemies, Damage Link from Sword of Valor or Blaze from Emyrean Salvo work best.

Best Master Skills for Machine Assassin Builds

Rank 5 Master Skills

Skill	Effect	Class Rank
Fighting Prowess	Boosts damage dealt by physical Arts by 30%.	Ogre Rank 5
Sappy-Sappy Drain!	Increase success rate of debuff effects by 15 percentage points.	Yumsmith Rank 5
Greatest Warrior	Boosts damage by 25% for each enemy in battle. (Maximum is 200%)	Seraph Rank 5

Sappy-Sappy Drain! is the most important Master Skill for Machine Assassins to increase the success rate of their debuffs. Fighting Prowess is also recommended since most of the Arts in this class are Physical Attacks.

Rank 15 Master Skills

Skill	Effect	Class Rank
Covert Attack	Reduces aggro generated from attacks by 20%.	Swordfighter Rank 15

It is recommended to keep most of the Rank 5 Master Skills listed above since they work best for the class. However, Covert Attack is a Rank 15 Master Skill that can replace one of the skills above in order to help reduce aggro.

Best Accessories for Machine Assassin Builds

Master Arts will be Pre-charged	Increased Damage from the Side	Boosted Aggro Reduction when Targeted
Wind Bracelet	Bronze Gauntlet	Repulsor Cuffs

Pre-charging your Master Arts is recommended to get some early debuffs on your opponent while they are unprepared. We recommend positioning your character to the side or rear of the enemy to make the most of their Arts, so an accessory that increases certain Positional damage is also ideal.

List of Accessories

Best Gems for Machine Assassin Builds

Boosted Debuff Power	Extended Debuff Duration	Increased Attack Damage
Swelling Scourge	Refined Incantation	Steelcleaver

Machine Assassins rely on debuffing their opponents to deal the most amount of damage and assist the rest of the team. Gems that increase the effectiveness of these debuffs are best for this class, and a boost in Attack is never a bad choice for Attackers.

All Gems and Their Effects

List of Machine Assassin Arts

Talent Arts

Base Art Information
Viral Vector	Area of Effect	AOE on Target	Power Multiplier	500%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Role Action Recharge	Recharge Gauge	4
	Effect	Applies 1 randomly chosen debuff(s) when Art hits.

Combat Arts

Base Art Information
Tyrant Cross	Area of Effect	One Target	Power Multiplier	180%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	35s
	Effect	Applies 1 randomly chosen debuff(s) when Art hits.
Fatal Bite	Area of Effect	One Target	Power Multiplier	200%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	20s
	Effect	Boosts damage dealt when attacking from the side by 100%.
Terror Onslaught	Area of Effect	One Target	Power Multiplier	200%
	Buff/ Debuff	Resistance Down	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	26s
	Effect	Inflicts Resistance Down when Art hits enemy rear.
Havoc Slayer	Area of Effect	Frontward AOE	Power Multiplier	300%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	35s
	Effect	When an attack hits, spreads target's debuffs to other enemies in range.
Mega Crescent	Area of Effect	One Target	Power Multiplier	120%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	11s
	Effect	Extends debuff effect duration by 10% when Art hits.

Master Arts

Art	Rank Mastered
Tyrant Cross	1
Fatal Bite	10
Viral Vector	20

Hero-Exclusive Arts

Base Art Information
Fury Reaper	Area of Effect	Frontward AOE	Power Multiplier	360%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	26s
	Effect	When an attack hits, spreads target's debuffs to other enemies in range.
Seventh Edge	Area of Effect	One Target	Power Multiplier	260%
	Buff/ Debuff	Resistance Down	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	23s
	Effect	Inflicts Resistance Down when Art hits enemy rear.
Hundred Shells	Area of Effect	One Target	Power Multiplier	140%
	Buff/ Debuff	-	Reaction	None
	Recharge Type	Time Recharge	Recharge Gauge	11s
	Effect	Extends debuff effect duration by 15% when Art hits.

Arts Guide: List of All Arts and Effects

List of Machine Assassin Skills

Class Skills

Skill	Base Effect
Chaos Chain	Debuffing an enemy boosts damage dealt by 20% (up to a maximum of 150%)
Phantom Strike	Adds 60% chance for attack to be unblockable.
Cursed Edge	Boosts damage dealt by 50% when attacking a debuffed enemy.
Anti-Erosion System	Grants 30% resistance to all debuffs.

Master Skills

Skill	Rank Mastered
Cursed Edge	5
Anti-Erosion System	15

List of All Skills

Xenoblade Chronicles 3 Related Guides

All Classes and Roles

All Attacker Classes

List of Attacker Classes
Swordfighter	Ogre	Flash Fencer
Yumsmith	Full Metal Jaguar	Stalker
Incursor	Soulhacker	Martial Artist
Seraph	Machine Assassin	Royal Summoner

All Defender Classes

List of Defender Classes
Zephyr	Heavy Guard	Guardian Commander
Lone Exile	Lost Vanguard	Noponic Champion

All Healer Classes

List of Healer Classes
Medic Gunner	Tactician	War Medic
Thaumaturge	Strategos	Signifer
Troubadour	Lifesage	-