Strikethrough

While wielding a Two-Handed Weapon, or while wielding a Bastard Sword or Dwarven Axe in your main hand and a Shield, Orb, Rune Arm, or nothing in your offhand, your attacks can Strikethrough. When your attacks can Strikethrough, every attack has a chance ("Strikethrough Chance") to hit an additional target.
 * Strikethrough Chance begins at 20% while considered Two Handed Fighting (which can be improved through feats and enhancements)
 * If your Strikethrough Chance is over 100%, you will always attack a second target (if in range) with a chance to attack a third.
 * If your Strikethrough Chance is over 200%, you will always attack a third target (if in range) with a chance to attack a fourth.
 * If your Strikethrough Chance is over 300%, you will always attack a fourth target (if in range) with a chance to attack a fifth.
 * If your Strikethrough Chance is 400% or higher, you will always attack a fifth target (if in range). Strikethrough effectively caps at 400%, in that while higher values are possible, they do not provide chances to attack sixth or further targets.

Strikethrough was introduced in Update 45 and replaced Glancing blows.

Strikethrough Chance

 * Base: 20%


 * Feats
 * Two Handed Fighting: +60% chance
 * Improved Two Handed Fighting: +30% chance
 * Greater Two Handed Fighting: +30% chance
 * Perfect Two Handed Fighting: +30% chance
 * Natural Fighting: +60/30/30% chance
 * Greater Domain of Destruction: +5% chance


 * Enhancements
 * Angry Arms: +5/10/20% chance
 * Mad Munitions: +5/10/20% chance
 * Focus Wide: +50% chance
 * Improved Second Strikes: +5/10/20% chance
 * Followthrough: +50% chance
 * Improved Second Strikes: +5/10/20% chance
 * Hand and a Half Training: +5/5/5/5% chance
 * Dance of Death: +50/100/200% chance
 * Dwarven Axe Training: +5/5/5/10% chance
 * Great Weapon Aptitude: +5/10/20% chance


 * Epic abilities
 * Malicious Weapons: +5/10/20% chance
 * Wild Weapons: +5/10/20% chance
 * Unbridled Fury: When activated, +100% chance


 * Filigrees
 * One Against Many (3 pieces): +5% chance

Special attacks that strike through
Some special attacks are able to hit the secondary target(s). Based on.

Artificer
Battle Engineer enhancements
 * Caustic Strike
 * Shatter Defence
 * Thunder-Shock Weapon

Renegade Mastermaker enhancements
 * Mighty Slam
 * Battlefist

Barbarian
Frenzied Berserker enhancements
 * Cracking Attack
 * Exhausting Blow

Occult Slayer enhancements
 * Ear Smash
 * Vicious strike

Ravager enhancements
 * Cruel Cut
 * Hate
 * Slaughter

Bard
Swashbuckler enhancements
 * Blow by Blow
 * Coupe de Grace

Warchanter enhancements
 * Frozen Fury

Cleric
Warpriest enhancements
 * Smite Foe

Druid

 * Nature's defensive stance allows strikethrough. While in bear form, strikethrough works regardless of what weapons you wield.
 * Animal form spell Shred. Other bear form Innate Attack (school) spells (e.g. Maul (spell)) suspected but not confirmed.

Favored Soul
War Soul enhancements
 * Smite Foe

Fighter

 * Kensai enhancement - Shattering Strike

Monk

 * Finishing moves
 * Fire/air/water/earth strikes
 * Fists of Darkness
 * Fists of Light

Henshin Mystic enhancements
 * Elemental words (all-consuming flame, porous soul, static charge, winters touch)

Ninja Spy enhancements
 * Ninjutsu line (modify touch of despair finishers)

Shintao enhancements
 * Jade Strike
 * Tomb of Jade
 * Dismissing strike

Paladin

 * Smite Evil

Rogue
Assassin enhancements
 * Shiv

Thief-Acrobat enhancements
 * Sly Flourish
 * Quick Strike

Feats

 * Sap
 * Stunning Blow
 * Sunder
 * Tendon Slice
 * Trip

Epic abilities

 * DC - Smite the Wicked
 * FoTW - Boulder's Might
 * LD - Anvil of Thunder, Lighting Mace, Volcano's Edge.
 * SD - Executioners Strike
 * US - Celestial Mandate (Couldn't test hate effect)
 * US - Draw them out (Couldn't test hate effect)

Special attacks that don't strike through
Void Strike (In update 46)

TBD