What grants Major Breach in ESO?

2 sets and 15 skill morphs grant Major Breach (4 area-of-effect, 11 single target). From skills it is available to: Dragonknight, Necromancer, Nightblade, Warden (plus the open lines Assault, Destruction Staff, One Hand and Shield, Psijic Order, Werewolf).

Does Major Breach stack in ESO?

No. Two sources of Major Breach do not stack — the second is wasted. One source is enough; cover it once and spend the rest of your build elsewhere.

All 17 sources of Major Breach in ESO

2 sets and 15 skill morphs grant Major Breach — each with the exact datamined line that grants it.

What it does-5948 enemy Resistances.

data retrieved 2026-08-23 · datamined via UESP

Sets that grant Major Breach (2)

Set	How (exact bonus)
Kynmarcher's Cruelty	(5 items) When you deal direct damage, you apply one of 5 random Major debuffs to enemies within 8 meters of you for 18 seconds. This effect can occur once every 8 seconds and only if an enemy is in range. Eligible effects are Major Breach, Major Cowardice, Major Defile, Major Maim, and Major Vulnerability.
Night Mother's Gaze	When you deal Critical Damage you apply Major Breach to the enemy, reducing their Physical and Spell Resistance by 5948 for 4 seconds.

Skills that grant Major Breach (15 morphs)

Listed per morph, because a morph is what you actually slot and morphs of the same skill do not all carry Major Breach.

Area of effect (4)

Can apply it to more than one enemy per cast — what a group needs.

Morph to slot	Skill line	How (exact datamined line)
Razor Caltropsmorph	Alliance War · Assault	Enemies who take damage from the caltrops have Major Breach applied to them, reducing their Physical and Spell Resistance by 5948 for 4.1 seconds.
Disintegrating Dragonfiremorph	Dragonknight · Draconic Power	The initial hit liquifies the armor of your enemies, applying Major Breach to enemies for the duration, reducing Physical and Spell Resistance by 5948.
Unnerving Boneyardmorph	Necromancer · Grave Lord	Desecrate the ground at the target location, dealing 3190 Frost Damage over 10 seconds to enemies inside and applying Major Breach and Minor Vulnerability, reducing Physical and Spell Resistance by 5948 and increasing damage taken by 5% for 4.1 seconds each tick.
Deep Fissuremorph	Warden · Animal Companions	Enemies damaged are afflicted with Major and Minor Breach, reducing their Physical and Spell Resistance by 5948 and 2974 for 10 seconds.

Single target (11)

One enemy per cast.

Morph to slot	Skill line	How (exact datamined line)
Crushing Weaponmorph	Guild · Psijic Order	Infuse your weapon with power, causing your next Light Attack used within 2 seconds to deal an additional 2160 Physical Damage and applying Major Breach to the target, reducing their Physical and Spell Resistance by 5948 for 5 seconds.
Mark Target	Nightblade · Assassination	Expose an enemy's weaknesses by applying Major Breach to them, reducing Physical Resistance and Spell Resistance by 5948 for 20 seconds.
Piercing Markmorph	Nightblade · Assassination	Expose an enemy's weaknesses by applying Major Breach to them, reducing Physical Resistance and Spell Resistance by 5948 for 20 seconds.
Reaper's Markmorph	Nightblade · Assassination	Expose an enemy's weaknesses by applying Major Breach to them, reducing Physical Resistance and Spell Resistance by 5948 for 20 seconds.
Weakness to Elements	Weapon · Destruction Staff	Send the elements to sap an enemy's defenses and afflict them with Major Breach for 30 seconds, reducing their Physical and Spell Resistance by 5948.
Elemental Drainmorph	Weapon · Destruction Staff	Send the elements to sap an enemy's defenses and afflict them with Major Breach for 1 minute, reducing their Physical and Spell Resistance by 5948.
Elemental Susceptibilitymorph	Weapon · Destruction Staff	Send the elements to sap an enemy's defenses and afflict them with Major Breach for 30 seconds, reducing their Physical and Spell Resistance by 5948.
Puncture	Weapon · One Hand and Shield	Also inflicts Major Breach on the enemy, reducing their Physical and Spell Resistance by 5948 for 15 seconds.
Pierce Armormorph	Weapon · One Hand and Shield	Also inflicts Minor Breach and Major Breach on the enemy, reducing their Physical Resistance and Spell Resistance by 2974 and 5948 for 15 seconds.
Ransackmorph	Weapon · One Hand and Shield	Also inflicts Major Breach on the enemy, reducing their Physical and Spell Resistance by 5948 for 15 seconds.
Rip and Tearmorph	World · Werewolf	Rip and tear into an enemy with your fangs, dealing 1347 Physical Damage while applying Major Breach for 15 seconds and the Sundered status effect on the initial rip and 1347 Bleed Damage while tearing out, when it is done.