In TearRing Saga: Utna Heroes Saga, this skill is known as Blazing Wind, or Gale in the fan translation.

Overview

In its various incarnations, activating Lethality will instantly deplete the enemy's health, regardless of the normal battle damage calculations. The potency of this effect is countered by the lowest activation rate of any attacking skill.

In Fire Emblem: The Blazing Blade and Fire Emblem: The Sacred Stones, Silencer uses half of the user's critical rate as a percentage. This makes it highly recommended to use Myrmidons as the base unit when creating an Assassin unit in The Sacred Stones, as Myrmidons typically possess high skill stats. It cannot activate against the Fire Dragon or Fomortiis, but can activate against other bosses, although the use of the Iron Rune/Hoplon Guard will prevent it from triggering.

Fire Emblem: Radiant Dawn served as the game that solidified Lethality's name in the original Japanese, while the English localization solidified Lethality's name in Path of Radiance. It should be noted that another skill in this game, Bane, uses Lethality's previous name that was used in Sacred Stones and Path of Radiance in the original Japanese.

In Awakening and Fates, if the user battles an enemy with Dragonskin, the skill is disabled. This skill is prioritized first over all other skill-activated attack skills. This is likely because it is the least likely to occur and the most devastating if activated. It can be blocked by Dual Guard and Guard Stance or the enemy can survive if they have Miracle and it activates.

In Fire Emblem Warriors: Three Hopes Lethality exists in two forms- a Dex-based trigger under its usual name, and a hidden Innate Ability under the name Sharpshooter that activates on critical hits. It can be earned by mastering the Bow Knight class with certain characters.

In Fire Emblem Engage, Lethality is a Bond Ring skill acquired by equipping Marisa's S Rank Bond Ring.

Stats

TearRing Saga: Utna Heroes Saga

Name	Activation	Capacity
Blazing Wind	(User's Skill - Enemy's Skill) +3)%, if Range is 1 and (Enemy's HP+Enemy's Defense)≤(2*Player Attack)	-
Effects	When activated, the user will be able to instantly kill the enemy.
Users	Base Skill: Ezekiel, Yoda.
Notes	-

Fire Emblem: The Blazing Blade

Fire Emblem: The Sacred Stones

Fire Emblem: Path of Radiance

Name	Activation	Capacity
Lethality	(Critical Rate/2)%	20
Effects	Allows the user to instantly kill a selected enemy unit. This skill is ineffective against certain characters.
Users	Occult Skill: Assassin class; Can be assigned with the Occult Scroll.
Notes	-

Fire Emblem: Radiant Dawn

Name	Activation	Capacity
Lethality	(Skill/2)%	30
Effects	Allows the user to instantly kill a selected enemy unit. This skill is ineffective against certain characters.
Users	Class Skill: Assassin
Notes	-

Fire Emblem Awakening

Name	Activation	Capacity
Lethality	(Skill/4)%	-
Effects	Allows the user to instantly kill a selected enemy unit. This skill is ineffective against certain characters.
Users	Learned Skill: Level 5 Assassins.
Notes	-

Fire Emblem Fates

Name	Activation	Capacity
Lethality	(Skill/4)%	-
Effects	Allows the user to instantly kill a selected enemy unit, provided that the unit would deal at least 1 damage in battle, not including any post-combat skills such as Savage Blow. This skill is ineffective against certain characters.
Users	Learned Skill: Level 5 or higher Master Ninja.
Notes	-

Fire Emblem Echoes: Shadows of Valentia

Fire Emblem Heroes

Name	Charge	SP
Lethality	4	500
Effects	When special triggers, treats foe's Def/Res as if reduced by 75% during combat. Disables non-Special skills that "reduces damage by X%."
Users	Volke

Fire Emblem Warriors

Name	Activation	Capacity
Lethality	(Luck) out of 200	-
Effects	May raise power of critical hits and combos.
Users	Learned from Niles's skill board.
Notes	Deal an additional 400% damage on a Critical Hit, Critical Rush, Warrior Special, or Dual Special when activating

Fire Emblem Three Houses

Name	Activation	Capacity
Lethality	(Dex/4)%	-
Effects	Chance to instantly kill a foe when dealing damage.
Users	Mastery Skill: Assassin
Notes	-

Fire Emblem Warriors: Three Hopes

• Lethality
• Sharpshooter

Name	Activation	Capacity
Lethality	(Dex x 0.25%)	-
Effects	Grants a (Dex x 0.25%) chance of instantly defeating non-commander units.
Users	Dimitri, Hubert, Bernadetta, Dorothea, Dedue, Sylvain, Mercedes, Ingrid, Rodrigue, Lorenz, Raphael, Marianne, Leonie, Holst, Balthus, Constance, Hapi, Seteth, Manuela, Jeritza, Catherine, Shamir, Jeralt, Rhea (Assassin Mastery Rank 2)
Notes	-

Name	Activation	Capacity
Sharpshooter	Critical hits	-
Effects	Causes critical hits to instantly defeat non-commander units.
Users	Master Bow Knight with Mercedes, Ingrid, Yuri, or Gatekeeper
Notes	-

Fire Emblem Engage

Name	Activation	Capacity
Lethality	Critical hits	-
Effects	When landing a critical hit, instantly kills foe. Trigger %=30. (Excludes certain powerful foes.)
Users	Skill of Marisa's S Rank Bond Ring

Trivia

• Enemies never have Lethality on them in games where they appear where the skill is triggered by stats for balancing reasons.
  • In the GBA series, there are no generic Assassins because of this.
  • Likewise in Awakening, while there are generic Assassins, none of them are equipped with Lethality; the only enemy with Lethality is Jaffar, although he's only present in the DLC-exclusive Smash Brethren and Rogues & Redeemers series. However, it's still possible to run into Lethality-using enemies via StreetPass and potentially Aversa's Paralogue.
    • Unlike the previous games prior to Awakening, Lethality is now treated as a normal hit and can miss, although very unlikely in most cases.
    • Miracle can activate against Lethality to survive the hit.
      • Coupled with Counter, it's possible to kill the Lethality user if the damage is high enough.
  • In Three Houses, enemy Guardian Golems in the Cindered Shadows expansion have Lethality as a barrier ability, though these Guardian Golems are intended to be avoided in the only map they appear on.
• When battle animations are toggled on and Lethality activates, it gives off a critical hit since the skill activates on a critical hit. However, if they're toggled off, Lethality uses normal damage sounds.
• In Awakening, the highest obtainable activation rate for Lethality is 25%. This is obtained with Inigo as Chrom's son, being in the Assassin class with Limit Breaker, which will give him 60 Skill, or 15% activation rate. This is increased to 25% with Rightful King.
• In Fates, playable first-generation characters can have a minimum 15% activation rate on Lethality with Quixotic, not factoring in their current skill stat. The Avatar and children characters can have a minimum 25% activation rate (also not factoring in their skill stat), as they can learn Hoshidan Unity which stacks with Quixotic and adds an additional 10% activation rate.
• In Echoes: Shadows of Valentia, the skill Lethality is fully programmed in the game files but goes unused during normal gameplay.
• In Warriors, it is possible to obtain a 100% activation rate for Lethality with the skill Amped and Luck +20 to obtain a Luck stat of 200 or higher on multiple characters. Though Olivia and Anna only need Amped in order to reach a luck stat of 200

Gallery

Animation of Xeno activating Blazing Wind in TearRing Saga.

Lethality in Fire Emblem: Path of Radiance.

Lethality in Fire Emblem: Radiant Dawn.