There is a twitch promotion allowing you to get Purple Footprints Effect inventory icon.pngPurple Footprints EffectPurple Footprints EffectBoots Modifier
Stack Size: 20
Adds purple footprints to a pair of boots.Right click this item then left click some boots to apply it.
Purple Footprints Effect inventory icon.png
, Purple Weapon Effect inventory icon.pngPurple Weapon EffectPurple Weapon EffectWeapon Effect
Stack Size: 20
Adds a Purple effect to a weapon.Right click this item then left click a weapon to apply it.
Purple Weapon Effect inventory icon.png
and Purple Portal Effect inventory icon.pngPurple Portal EffectPurple Portal EffectPortal ModificationThis character's portals use a purple effect.Right click this to set or remove your Portal effect.Purple Portal Effect inventory icon.png if you have twitch prime.

Chain Support

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Chain SupportSupport, Chaining, Projectile
Icon: c
Mana Multiplier: 150%
Requires Level 38Per 1% Quality:
1% increased Projectile Speed
Supported Projectile Skills Chain +2 times
Supported Projectile Skills deal (50-31)% less Damage
This 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 Active Skill Gem you wish to augment. Right click to remove from a socket.
Chain Support inventory icon.png
Acquisition
Level: 38
Chain is a support gem that causes any projectiles created by the linked skill to chain when they hit an enemy. When this happens, the projectile targets another enemy in range and changes direction to fly towards second enemy. It will continue to chain until all the chains are used up. This gem adds 2 to the number of times a projectile can chain.

The gem also works with non-projectile skills that can chain, such as Tempest Shield inventory icon.pngTempest ShieldTempest ShieldSpell, Lightning, Chaining, Duration
Mana Cost: (17 to 21)
Cast Time: 0.50 sec
Critical Strike Chance: 6.00%
Damage Effectiveness: 60%
Requires Level 16Enchants your shield with the power of storms, which lashes out to deal arcing lightning damage to attackers when you block them. Blocking refreshes the duration of Tempest Shield.Per 1% Quality:
1% increased Lightning Damage
Deals (24-284) to (36-426) Lightning Damage
Additional 3% Shield Block Chance
Chain +1 Times
Base duration is 12 seconds
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Tempest Shield skill icon.png
Tempest Shield inventory icon.png
, Wild Strike inventory icon.pngWild StrikeWild StrikeProjectile, Attack, Melee, Lightning, Cold, Fire, AoE, Chaining
Mana Cost: 6
Cast Time: 1.00 sec
Projectile Speed: 1800
Requires Level 28Your melee weapon strikes an enemy, converting some of the damage to a random element. Then, depending on the element chosen, it releases an explosion, an arcing bolt of lightning, or an icy wave.Per 1% Quality:
1% increased Elemental Damage
Deals (130-175.6)% of Base Attack Damage
100% of Physical Damage Converted to Fire, Cold or Lightning Damage
Chain +(4-7) Times
2 additional Projectiles
(0-19)% increased Area of Effect
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Wild Strike skill icon.png
Wild Strike inventory icon.png
, Arc inventory icon.pngArcArcSpell, Chaining, Lightning
Mana Cost: (9 to 26)
Cast Time: 0.80 sec
Critical Strike Chance: 5.00%
Damage Effectiveness: 70%
Requires Level 12An arc of lightning stretches from the caster to a targeted nearby enemy and chains on to additional targets.Per 1% Quality:
0.5% chance to Shock enemies
Deals (2-47) to (35-886) Lightning Damage
10% chance to Shock enemies
Chain +(2-7) Times
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Arc skill icon.png
Arc inventory icon.png
and Vaal Arc inventory icon.pngVaal ArcVaal ArcVaal, Spell, Chaining, Lightning
Souls per use: 32 (N) / 48 (C) / 64 (M)
Can store 1 use(s)
Cast Time: 0.80 sec
Critical Strike Chance: 5.00%
Damage Effectiveness: 80%
Requires Level 12An arc of lightning stretches from the caster to a targeted nearby enemy and chains on to many additional targets.Per 1% Quality:
1.5% increased Shock Duration on enemies
Deals (2-49) to (35-938) Lightning Damage
100% chance to Shock enemies
Chain +40 Times
Corrupted
Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
Vaal Arc skill icon.png
Vaal Arc inventory icon.png
.

See chaining for more information.

Gem level progression

LevelLvl.dexterityless
Damage
Exp.Total Exp.
1386350%00
2406649%388,734388,734
3426948%477,437866,171
4447247%583,7861,449,957
5467546%710,3592,160,316
6487845%1,355,5113,515,827
7508144%1,138,8774,654,704
8528443%1,368,2336,022,937
9548742%1,638,3387,661,275
10569041%1,956,6489,617,923
11589340%3,655,18413,273,107
12609639%3,017,32716,290,434
13629938%3,576,23219,866,666
146410237%4,231,66724,098,333
156510336%2,395,07826,493,411
166610535%8,421,06334,914,474
176710634%16,159,98351,074,457
186810833%41,170,36792,244,824
196910932%86,794,448179,039,272
207011131%157,405,063336,444,335
217211430%N/AN/A
2274N/A29%N/AN/A
2376N/A28%N/AN/A
2478N/A27%N/AN/A
2580N/A26%N/AN/A
2682N/A25%N/AN/A
2784N/A24%N/AN/A
2886N/A23%N/AN/A
2988N/A22%N/AN/A
3090N/A21%N/AN/A

Quest reward

This skill is given as quest reward for the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Eternal Nightmare*The items are awarded for this quest when Dialla activates the device
Act 4
Normal
yes
yes
yes
yes
yes
yes
yes

Vendor reward

This skill can be bought at the listed npc vendors after completing the following quests:
ClassMarauderTemplarWitchShadowRangerDuelistScion
Quest
The Eternal Nightmare*The items are awarded for this quest when Dialla activates the device
Act 4
Siosa
yes

Version history

Version Changes
2.0.0
  • The mana multiplier has been reduced from 175% to 150%.
1.2.0
  • The mana multiplier has been reduced from 200% to 175%.
0.10.0
  • Damage penalty has been increased from -40% to -50%
  • The number of chains has been reduced from 3 to 2.
0.9.13h
  • Fixed a bug with the graphical effects of projectiles augmented by Chain.
0.9.13
  • Chain has been added to the game.