Duration: Spark duration determines how long spark projectiles will persist, and is increased by both skill duration passives and support.
Ricochets: Spark projectiles will bounce off of terrain obstructions and edges for as long as they persist. If a spark projectile strikes a mob, it will be absorbed unless it can pierce.
A single cast of Spark can hit an enemy once every second (after patch 2.3). Keep in mind this is per cast, not per projectile. So without any increase in duration, a single cast can hit an enemy twice with the base duration of 1.5 seconds. That is why projectile speed and increased duration can result in significant increases in real DPS.
When an enemy is hit with a Spark projectile, projectiles from the same cast will go through that enemy without damaging it, as if it wasn't there (until the enemy can be hit again with the same cast which happens after 1 second).
There is no guaranteed distance or time the projectiles will go straight, but they are guaranteed to go forward if there are no obstacles.
After patch 2.3 Spark projectiles now destroy themselves after travelling 150 units from the character. It should be noted that it's entirely possible for infinite-duration sparks to bounce/circle around within that radius, and never leave it. In general, sparks will be more likely to stay within the radius in an enclosed space with walls to bounce off, and more likely to leave it in open areas.[1]
Can be used in left mouse button slot to cast and move.
Spark Duration and Cast Speed
Given the current cast speed of 0.65 seconds, and the lifetime of the Spark is 1.5 seconds, you can get about 6 sparks into play before the initial sparks expire. 1.5 seconds / 0.65 seconds = 2.3 casts or 6 sparks.
To figure out the required cast speed to get more sparks into play, divide 1.5 by the number of casts.
Note, you may have to decrease these cast times, as this the minimum time; the initial sparks will expire just as the new ones are leaving your position.
To calculate the new desired increase in casting speed, consider that if you increase your speed by 100%, you'll cut the time in half.
As an example, if we wanted to get to 0.5 seconds, this is an % increase of (0.65/.5 - 1)*100% = 30%
Gem level progression
Level
Mana Cost
Lightning Damage
# Projectiles
Exp.
Total Exp.
1
1
0
5
1 to 28
N/A
0
0
2
2
0
5
2 to 32
N/A
70
70
3
4
16
6
2 to 40
N/A
308
378
4
7
22
7
3 to 54
N/A
1554
1932
5
11
31
7
4 to 76
N/A
6667
8599
6
16
41
9
6 to 110
N/A
26047
34646
7
20
50
10
8 to 145
N/A
49725
84371
8
24
58
11
10 to 188
N/A
95714
180085
9
28
67
11
13 to 239
N/A
169595
349680
10
32
75
12
16 to 301
N/A
283759
633439
11
36
83
13
20 to 376
N/A
453996
1087435
12
40
92
14
25 to 466
N/A
703128
1790563
13
44
100
15
30 to 573
N/A
1061223
2851786
14
48
109
16
37 to 702
N/A
2065870
4917656
15
52
117
17
45 to 855
N/A
2507110
7424766
16
56
125
18
55 to 1037
N/A
5798936
13223702
17
60
134
19
66 to 1253
N/A
15083919
28307621
18
64
142
20
79 to 1509
N/A
27792735
56100356
19
67
148
21
91 to 1731
N/A
43869739
99970095
20
70
155
21
104 to 1983
N/A
242081556
342051651
21
72
159
22
114 to 2170
N/A
N/A
N/A
22
74
N/A
22
125 to 2373
N/A
N/A
N/A
23
76
N/A
23
136 to 2593
N/A
N/A
N/A
24
78
N/A
23
149 to 2832
N/A
N/A
N/A
25
80
N/A
24
163 to 3091
N/A
N/A
N/A
26
82
N/A
24
178 to 3373
N/A
N/A
N/A
27
84
N/A
25
194 to 3678
N/A
N/A
N/A
28
86
N/A
25
211 to 4009
N/A
N/A
N/A
29
88
N/A
26
230 to 4368
N/A
N/A
N/A
30
90
N/A
26
250 to 4758
N/A
N/A
N/A
31
91
N/A
26
261 to 4965
N/A
N/A
N/A
32
92
N/A
27
273 to 5180
N/A
N/A
N/A
33
93
N/A
27
284 to 5404
N/A
N/A
N/A
34
94
N/A
27
297 to 5637
N/A
N/A
N/A
35
95
N/A
27
309 to 5880
N/A
N/A
N/A
36
96
N/A
27
323 to 6132
N/A
N/A
N/A
37
97
N/A
28
337 to 6395
N/A
N/A
N/A
38
98
N/A
28
351 to 6669
N/A
N/A
N/A
39
99
N/A
28
366 to 6953
N/A
N/A
N/A
40
100
N/A
28
382 to 7250
N/A
N/A
N/A
Item acquisition
Spark can drop anywhere.
Recipes
Spark can be created from the following recipes:
Amount
Part
Description
Meta
13
The CataclysmThe Cataclysm13Level 21 Spell Gem CorruptedThe mighty warriors traded in blows, the nimble archers in arrows, yet it was the brazen thaumaturgists who would bring catastrophe to all.
Random corruptedlevel 21 Spell gem
A
6
The FoxThe Fox6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox." - Ezomyte Proverb
Random level 20 gem
A
3
Gemcutter's PromiseGemcutter's Promise3Gem Quality:+20%"I swore to use my position to help the people. What good is power when it just accumulates on the already-powerful?" - Erasmus, Imperial Gemcutter
Random gem with 20% quality
A
1
Gemcutter's IncubatorGemcutter's IncubatorStack Size: 10Adds an incubated Quality Gem item to an equippable item Item drops after killing {0} monstersRight click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters.
Random gem with 1–20% quality
A
1
The VoidThe Void1Reach into the Void and claim your prize.
Random divination card set exchange
A
Vendor reward
This item can be bought at the listed NPC vendors, after completing the following quests:
The following threshold jewels augment the skill gem:
Item
Radius
Stats
Alternate skill effects
Name
Cost
Description
Spark Spiders EffectSpark Spiders EffectSkill Gem EffectYour Sparks become skittering spiders of raw electrical energy
95
Replaces the standard lightning effects on a SparkSparkSpell, Projectile, Duration, Lightning Level: (1-20) Cost: (5-21) Mana Cast Time: 0.65 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 190% Projectile Speed: 420Launches unpredictable sparks that move randomly until they hit an enemy or expire.Deals (1-104) to (28-1983) Lightning Damage Base duration is 2.00 seconds Fires (4-8) Projectiles
Additional Effects From 1-20% Quality: Fires +(0.1-2) ProjectilesPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. gem with skittering, electrical spiders.
Note that helmet enchantments are no longer obtainable since version 3.23.0 and can only be obtained in permanent leagues as already enchanted items from before this patch.
SparkSparkSpell, Projectile, Duration, Lightning Level: (1-20) Cost: (5-21) Mana Cast Time: 0.65 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 190% Projectile Speed: 420Launches unpredictable sparks that move randomly until they hit an enemy or expire.Deals (1-104) to (28-1983) Lightning Damage Base duration is 2.00 seconds Fires (4-8) Projectiles
Additional Effects From 1-20% Quality: Fires +(0.1-2) ProjectilesPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. and Vaal SparkVaal SparkSpell, Projectile, Duration, Vaal, Lightning Level: (1-20) Souls Per Use: 30 Can Store 1 Use(s) Soul Gain Prevention: 5 sec Cast Time: 0.65 sec Critical Strike Chance: 5.00% Effectiveness of Added Damage: 40%Continuously launches unpredictable sparks in all directions that move randomly until they hit an enemy or expire.Deals (1-24) to (11-454) Lightning Damage Base duration is 2.00 seconds Modifiers to Skill Effect Duration also apply to this Skill's Soul Gain Prevention Fires Projectiles in random directions
Additional Effects From 1-20% Quality: Fires +(0.1-2) ProjectilesCorruptedPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. projectiles (including those from monster Sparks) are now 20% slower. Quality on Spark and Vaal Spark is now worth 1% projectile speed per point of quality (rather than 2%). The time that Sparks must travel before they re-arm has been increased from 500ms to 1000ms. Spark projectiles now destroy themselves after travelling 150 units, which is in-line with other projectiles.
Lowered Spark's damage in PvP by 1% per gem level up to level 10, then 2% per gem level (damage reduced by 10% at level 10, and by 30% at level 20). Spark's tendency to completely coat the battlefield in unavoidable damage was making PvP matches extremely unfun, especially at high levels. While this doesn't solve the core issue of spark's unavoidable damage, it should give players a chance to close the gap.
Spark does 20% more damage at all levels. It now bounces off Frost Walls, regardless of whether they are cast by players or monsters. The critical strike chance has been increased from 4% to 5% (this change was not listed in the official patch notes).
Increased the damage of the following skills at low levels: SparkSparkSpell, Projectile, Duration, Lightning Level: (1-20) Cost: (5-21) Mana Cast Time: 0.65 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 190% Projectile Speed: 420Launches unpredictable sparks that move randomly until they hit an enemy or expire.Deals (1-104) to (28-1983) Lightning Damage Base duration is 2.00 seconds Fires (4-8) Projectiles
Additional Effects From 1-20% Quality: Fires +(0.1-2) ProjectilesPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket., Cold SnapCold SnapSpell, AoE, Cold, Duration Level: (1-20) Cost: (11-28) Mana Cooldown Time: 3.00 sec Can Store 1 Use(s) Cast Time: 0.85 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 320% AoE Radius: 16Requires Level 16Creates a sudden burst of cold in a targeted area, damaging enemies. Also creates an expanding area which is filled with chilled ground, and deals cold damage over time to enemies. Enemies that die while in the area have a chance to grant Frenzy Charges. The cooldown can be bypassed by expending a Frenzy Charge.Deals (34-1440) to (51-2160) Cold Damage Base duration is 5.00 seconds Deals (28.7-1895.4) Base Cold Damage per second Modifiers to Spell Damage apply to this Skill's Damage Over Time effect Burst Base radius is 1.5 metres Chilled Ground Base initial radius is 1.5 metres Chilled Ground Base final radius is 3 metres 25% chance to gain a Frenzy Charge when an Enemy Dies while in this Skill's Area
Additional Effects From 1-20% Quality: (1-20)% more Effect of ChillPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket., Ice SpearIce SpearCritical, Spell, Projectile, Cold Level: (1-20) Cost: (8-23) Mana Cast Time: 0.70 sec Critical Strike Chance: 7.00% Effectiveness of Added Damage: 130% Projectile Speed: 1000Requires Level 12Launches shards of ice in rapid succession. After travelling a short distance they change to a second form, which moves much faster and pierces through enemies.Deals (22-568) to (33-852) Cold Damage Fires 2 Projectiles Second form has 600% increased Critical Strike Chance Second form has +(30-49)% to Critical Strike Multiplier Second form has 300% more Projectile Speed
Additional Effects From 1-20% Quality: Second form has +(2-40)% to Critical Strike MultiplierPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. and to a lesser extent, Freezing PulseFreezing PulseSpell, Projectile, Cold Level: (1-20) Cost: (5-21) Mana Cast Time: 0.65 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 330% Projectile Speed: 1800An icy projectile which has a chance to freeze enemies it passes through. The projectile fades quickly, reducing damage and freezing chance until it dissipates.Deals (8-1458) to (12-2188) Cold Damage Projectiles Pierce all Targets Projectiles continuously lose Damage, up to 50% less Damage by the time they dissipate Projectiles have 25% chance to Freeze, which is lost over the first quarter of their flight
Additional Effects From 1-20% Quality: (2-40)% increased Projectile SpeedPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. and Storm CallStorm CallSpell, AoE, Duration, Lightning Level: (1-20) Cost: (6-16) Mana Cast Time: 0.50 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 250%Requires Level 12Sets a marker at a location. After a short duration, lightning strikes the marker, dealing damage around it and causing lightning strikes at any other markers you've cast.Deals (21-949) to (39-1762) Lightning Damage Base duration is 1.50 seconds +(0-0.6) metres to radius
Additional Effects From 1-20% Quality: (0.75-15)% chance for Lightning to Strike the Marker when CastPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket..
Spells with Damage Effectiveness no longer have their own damage affected by Damage Effectiveness. Damage values on these skills have been updated to reflect this.
Fixed a bug where Projectile Speed bonuses did not apply to SparkSparkSpell, Projectile, Duration, Lightning Level: (1-20) Cost: (5-21) Mana Cast Time: 0.65 sec Critical Strike Chance: 6.00% Effectiveness of Added Damage: 190% Projectile Speed: 420Launches unpredictable sparks that move randomly until they hit an enemy or expire.Deals (1-104) to (28-1983) Lightning Damage Base duration is 2.00 seconds Fires (4-8) Projectiles
Additional Effects From 1-20% Quality: Fires +(0.1-2) ProjectilesPlace into an item socket of the right colour to gain this skill. Right click to remove from a socket. when used with a Spell Totem SupportSpell Totem SupportSupport, Spell, Totem Icon: T Level: (1-20) Cost & Reservation Multiplier: 200%Requires Level 8Supports spell skills that are not triggered. Instead of casting that spell, you will summon a totem that casts the spell for you.Supported Skills deal (49-40)% less Damage Supported Skills will summon a Totem which uses that Skill Totem lasts 8 seconds Supported Skills have 40% less Cast Speed
Additional Effects From 1-20% Quality: Supported Skills have (0.5-10)% increased Totem Placement speedThis is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Skill Gem you wish to augment. Right click to remove from a socket..
The Cataclysm
The Cataclysm
13Level 21 Spell Gem
The Fox
6Level 20 Gem"Masters of wit, strength and cunning. To survive the harsh winters, you must be like the fox."
Gemcutter's Promise
3Gem
Gemcutter's IncubatorGemcutter's IncubatorStack Size: 10Adds an incubated Quality Gem item to an equippable item
The Void
1Reach into the Void and claim your prize.
Spark Spiders EffectSkill Gem EffectYour Sparks become skittering spiders of raw electrical energy
95
SparkSparkSpell, Projectile, Duration, Lightning
gem with skittering, electrical spiders. 
Preview
