When Struck

Skills	% Chance to Cast	Charges	Oskills	Aura When Equipped

% Chance to Cast When Struck is applied whenever the user is hit by a melee attack (excluding charging Claw Vipers and Reanimated Horde), a missile attack applying weapon or monster damage, persistent traps or fires, or exploding barrels. Not applied by missiles which only apply their own damage or skill damage. Most of the applicable missile attacks are intuitive (the user is hit by a visible arrow, bolt, dart, javelin, quill or throwing weapon), but others are less obvious: Tainted lightning orbs Skeleton Mage bolts Lightning Spire bolts Willowisp lightning bolts Imp fire bolts Claw Viper missiles Succubus and Stygian Witch bolts Not applied by returned damage or death explosions.

Skills are cast in a variety of ways:

User	User location	User to attacker	Attacker location
Fade Venom Cyclone Armor Bone Armor Blaze Enchant Teleport Chilling Armor Delerium	Slow Missiles Howl Poison Nova Static Field Frost Nova Nova	Twister Tornado Bone Spirit Holy Bolt Charged Bolt Chain Lightning Glacial Spike	Mind Blast Curses Bone Prison Fist of the Heavens Fire Wall Meteor Blizzard Hydra

• Ladder Unique items can be found in Ladder and single-player games; Ladder Rune Words can only be made in Ladder games.

Amazon skills

Skill	Level	Chance	Item	Ladder
Slow Missiles	5	4	Template:D2 Unique body armor	No

Assassin skills

Skill	Level	Chance	Item	Ladder
Fade	8	5	Template:D2 Unique	No
	11	6	Template:D2 Unique sword/hammer/axe	Yes
	15	5	Template:D2 Unique body armor	No
Mind Blast	14	6	Template:D2 Unique helm	No
Venom	18	20	Template:D2 Unique body armor/shield	Yes

Barbarian skills

Skill	Level	Chance	Item	Ladder
Howl	1	3	Template:D2 Unique body armor	No

Druid skills

Skill	Level	Chance	Item	Ladder
Cyclone Armor	15	5	Template:D2 Unique body armor	No
Twister	1	7	Template:D2 Unique missile weapon	No
Tornado	5	4	Template:D2 Unique	No

Necromancer skills

Skill	Level	Chance	Item	Ladder
Amplify Damage	14	35	Template:D2 Unique missile weapon	Yes
Bone Armor	10	15	Template:D2 Unique body armor	No
Dim Vision	3	6	Template:D2 Unique	No
	3	15	Template:D2 Unique body armor	No
Weaken	5	4	Template:D2 Unique	No
Iron Maiden	1	5	Template:D2 Unique	No
	2	6	Template:D2 Unique	No
	2	10	Template:D2 Unique	No
	6	8	Template:D2 Unique	No
Terror	3	15	Template:D2 Unique	No
	13	14	Template:D2 Unique helm	No
Confuse	15	10	Template:D2 Unique helm/shield	Yes
Bone Prison	2	10	Template:D2 Unique	No
Lower Resist	7	10	Template:D2 Unique	No
Poison Nova	5	5	Template:D2 Unique	No
	6	9	Template:D2 Unique	No
	10	10	Template:D2 Unique	No
	15	15	Template:D2 Unique	Yes
Bone Spirit	10	5	Template:D2 Unique	No

Paladin skills

Skill	Level	Chance	Item	Ladder
Holy Bolt	12-28	50	Template:D2 Unique	No
Fist of the Heavens	7	5	Template:D2 Unique	No

Sorceress skills

Skill	Level	Chance	Item	Ladder
Charged Bolt	3	25	Template:D2 Unique	No
	4	12	Template:D2 Set	No
	5	2	Template:D2 Unique	No
	5	15	Template:D2 Unique	No
Static Field	3	10	Template:D2 Set	No
	5	25	Template:D2 Set (Full)	No
Frost Nova	5	10	Template:D2 Unique	No
	9	5	Template:D2 Unique	No
Blaze	8	5	Template:D2 Unique	No
	15	5	Template:D2 Unique body armor	No
Nova	3	25	Template:D2 Set	No
	7	5	Template:D2 Unique	No
Fire Wall	17	25	Template:D2 Unique polearm	Yes
Enchant	5	5	Template:D2 Set	No
Chain Lightning	5	5	Template:D2 Unique	No
	5	12	Template:D2 Set	No
	5	18	Template:D2 Set	No
Teleport	1	25	Template:D2 Unique	No
Glacial Spike	3	10	Template:D2 Set	No
Meteor	13-19	2	Template:D2 Unique	No
Blizzard	6	4	Template:D2 Unique	No
	7-20	5	Template:D2 Unique	No
Chilling Armor	15	20	Template:D2 Unique weapon/body armor	Yes
Hydra	6	3	Template:D2 Unique	No

Other skills

Skill	Level	Chance	Item	Ladder
Delerium	50	1	Template:D2 Unique helm	No

Item suffixes

• All suffixes can spawn on magic, rare and crafted items.
• All suffixes are in the same affix group as on Attack, on Striking and charged suffixes.
• Template:D2 Crafted items always spawn with 5% Chance to Cast Level 4 Frost Nova When Struck.

Class	Skill	Level	Chance	Item	Alvl	Rlvl
Sorceress	Charged Bolt	3	10	Armor Amulet Ring	6	4
		4	12		16	12
		5	14		26	19
	Frost Nova	3	5	Armor Amulet	12	9
	Nova	3	10	Armor Ring	18	13
		4	12		28	21
		5	14		38	28
	Hydra	3	10	Amulet	40	30

References

• Onderduiker, % Chance to Cast and Curses Tests (Technical Discussion)