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The Defender of Tomorrow
Release Date:July 7th, 2012
Cost:6300 BE
975 RP
Health Regen HealthRegen Mini Icon.png :571.2 (+ 0.8)
Mana Mana Mini Icon.png :357.2 (+ 37)
Mana Regen ManaRegen Mini Icon.png :6 (+ 0.8)
Movespeed MovementSpeed Mini Icon.png :335
Attack Damage AttackDamage Mini Icon.png :50.38 (+ 3.5)
Attack Speed AttackSpeed Mini Icon.png :0.658 (+ 3%)
Range Range Mini Icon.png :125 / 500
Armor Armor Mini Icon.png :22.38 (+ 3.5)
Magic Resist MagicResist Mini Icon.png :30 (+ 0)


Armed with wit, charm, and his signature transforming hammer, Jayce lives to protect his native Piltover. Long before his nation called him a hero, however, he was a promising young inventor. When Piltover commissioned him to study a rare arcane crystal, Jayce discovered it could be used as a vast energy source. Eager to make a name for himself, he began developing a device to harness its power. Word of the crystal's potential reached beyond the borders of Piltover.  Viktor, the machine-augmented scientist from Zaun, brought Jayce an offer - together, they could use the crystal to advance his "glorious evolution," a vision of humanity fused with technology. Jayce refused, but the Zaunite had no intention of leaving empty handed. He effortlessly blasted Jayce aside and seized the crystal, incinerating the lab's meager security force as he left for Zaun. Jayce implored the Piltover government to respond, but the officials refused to support an act of aggression. He decided to act alone, realizing that if no one struck back, Piltover would never be safe.

Jayce returned to the lab to prepare for his attack. After intense research, development, and hands-on testing, he emerged with his crowning achievement - the Mercury Hammer. Weapon in hand, Jayce marched to Zaun and began his one-man assault. Viktor's acolytes rushed to stop him, but Jayce smashed them aside, fighting his way into the heart of the lab. Inside, Jayce saw the horrifying brilliance of Viktor's creations, all powered by the energy of the arcane crystal. He realized that his only option was to destroy the power source, but Viktor stood in his way. Though their clash left both scientists heavily wounded, Jayce managed a desperate strike at the crystal. He shattered it and escaped as Viktor's machines erupted in flames. When he returned home, exhausted but victorious, the citizens of Piltover hailed Jayce as a hero. He reveled in the adoration, but knew that his actions had drawn the attention of dangerous enemies. Now devoted to the defense of his people, Jayce is Piltover's best hope for a bright future.

"Trust me: if we're smart, Piltover can stand strong against any threat. Hey, I'm living proof."

-  Jayce


Jayce's Abilities can level up to 6 times, with this R automatically leveling.

PassiveHextech Capacitor
Hextech Capacitor.png
(Innate) Jayce gains 40 movement speed for 1.25 seconds and ignores unit collision each time Transform is cast.

QTo the Skies! / Shock BlastBanshee's Veil.pngCleanseQss.png

(Active) While in Hammer Mode, Jayce leaps to an enemy, dealing physical damage to his target and to enemies in the area, slowing them for 2 seconds.
Cost: 40 mana
Cooldown: 16 / 14 / 120 / 10 / 8 / 6 seconds
Physical Damage: 40 / 80 / 120 / 160 / 200 / 240
(+120% of bonus Attack Damage)
Slow: 30 / 35 / 40 / 45 / 50 / 55%
(Active) While in Cannon mode, Jayce fires an orb of electricity that detonates upon hitting an enemy or reaching the end of its path, dealing physical damage to all enemies in the area of the explosion.
If Shock Blast is fired through an Acceleration Gate, the missile speed and range will be increased, and its damage will increase by 40%.
Cooldown: 8 seconds
Cost: 55 / 60 / 65 / 70 / 75 / 80 mana
Physical Damage: 70 / 120 / 170 / 220 / 270 / 320
(+120% of bonus Attack Damage)
Accelerated Physical Damage: 98 / 168 / 238 / 308 / 378 / 392
(+168% of bonus Attack Damage)

Additional Information about the Skill:

  • To the Skies' slow effect can be removed with either Cleanse or Quicksilver Sash. Shock Blast does not apply debuffs.

WLightning Field / Hyper ChargeBanshee's Veil Grey.png

(Passive) While in Hammer Mode, Jayce regenerates mana each time he strikes an enemy while in Hammer Stance.
(Active) While in Hammer Mode, Jayce creates an electric aura, dealing magic damage over 4 seconds to nearby enemies.
Cost: 40 mana
Cooldown: 10 seconds
Mana per Hit: 6 / 8 / 10 / 12 / 14
Magic Damage per Second: 25 / 40 / 55 / 70 / 85 / 100
(+25% of Ability Power)
Total Magic Damage: 100 / 160 / 220 / 280 / 340 / 400
(+100% of Ability Power)
(Active) While in Cannon Mode, Jayce gains a burst of energy, increasing his attack speed to maximum for 3 attacks. These attacks deal varied damage depending on rank.
Cost: 40 mana
Cooldown: 13 / 11.4 / 9.8 / 8.2 / 6.6 / 5 seconds
Damage: (10 / 78 / 86 / 97 / 102 / 110% of Attack Damage)

EThundering Blow / Acceleration GateBanshee's Veil Partly.png

(Active) While in Hammer Mode, Jayce deals magic damage equal a percentage of the target's maximum health, knocking the target back a short distance. This damage is capped against monsters.
Cost: 40 / 50 / 60 / 70 / 80 mana
Cooldown: 15 / 14 / 13 / 12 / 11 / 10 seconds
Max Health to Damage ratio: 8 / 10.4 / 12.8 / 15.2 / 17.6 / 20%
(+100% of bonus Attack Damage)
Max Damage to Monsters: 200 / 300 / 400 / 500 / 600
(Active) While in Cannon Mode, Jayce deploys an Acceleration Gate for 4 seconds, increasing the movement speed of all allies who pass through it for 3 seconds. This bonus fades over the duration.
Cost: 50 mana
Cooldown: 16 seconds
Movement Speed: 30 / 35 / 40 / 45 / 50 / 55%

RTransform: Mercury Cannon / Transform: Mercury HammerBanshee's Veil Grey.pngQuicksilver Sash.png

(Active) While in Hammer Mode, Jayce transforms the Mercury Hammer into the Mercury Cannon, gaining new abilities and ranged attacks.
The next attack in Cannon Stance reduces the enemy's Armor and Magic Resist for 5 seconds.
Cooldown: 6 seconds
Armor and Magic Resist Reduction: 10 / 15 / 20 / 25%
(Active) While in Cannon Mode, Jayce transforms the Mercury Cannon into the Mercury Hammer, gaining new abilities and bonus Armor and Magic Resist.
The next attack in Hammer Stance deals additional magic damage.
Cooldown: 6 seconds
Bonus Armor and Magic Resist: 5 / 15 / 25 / 35
Bonus Magic Damage: 20 / 60 / 100 / 140
(+40% of Ability Power)

Additional Information about the Skill:

Transform: Mercury Cannon's armor and magic resist debuff can be removed with Quicksilver Sash.

Competitive Usage

In Premier Tournaments
Event Bans Picks Wins Losses Win % Picked/Banned in % of Games
LCS logo small.png 2014 NA LCS Spring Round Robin 2 4 2 2 50 5.3
Riot 2019 logo small.png 2014 NA Challenger Series #2 0 1 0 1 0 6.7
GPL logo small.png 2014 GPL Winter 4 24.5 5 19.5 20.4
Riot 2019 logo small.png Season 3 World Championship 0 1 1 0 100 1.5
LPL logo small.png Tencent LPL 2013 Summer 20 4 4 0 100 28.6

Patch History


Hammer Q's cost reduced. Base damage and ratio increased.

Another niche pick, Jayce has been on the cusp of widespread play for a while now. We’re not touching his poke where he’s already a strong contender, but tuning up Jayce’s ability to follow-up that poke (or create lane presence) with a hammer.

To the face.

25px Q - To the Skies!

COST : 40/45/50/55/60 mana 40 mana at all ranks
BASE DAMAGE : 30/70/110/150/190/230 40/80/120/160/200/240
RATIO : 1.0 bonus attack damage 1.2 bonus attack damage


In a world without mana potions (and generally less early mana regeneration), we've identified a few champions for some emergency rations, giving early mana boosts until they can get their footing and purchase items to make up the deficit. This also means we can really understand which champions relied on mana potions as a crutch to limp through the early to mid game, and we can give additional love if necessary.


The following champs have +50 base mana and -3 mana scaling (net -1 mana at level 18):

R gives its bonuses at the appropriate levels.

"Jayce was actually getting his bonuses a level earlier than intended. He'll still get them, but has to wait for his opponents to have access to their Ultimates before Power-slamming the competition."
  • 25px R - Mercury Cannon/Hammer
    • CAN TOUCH THIS : Fixed a bug that gave Jayce his R bonuses at 5/10/15 instead of 6/11/16

Transform now has 1 rank, Jayce's spells now have 6.

"For the average player, putting points in R feels like a trap and was rarely satisfying, so we're adding 6 ranks to his spells and giving Jayce his bonuses from Transform when he would have gotten them for free. Below this context are a lot of numbers, but the key things to take away are that Jayce now has very different power spikes relative to other champions, and his signature Shock Blast / Acceleration Gate combo is much stronger, pushing the incentive to take him over similar choices in a dedicated poke/siege strategy."
  • To The Skies!.png Q - To The Skies!
    • BASE DAMAGE : 20/65/110/155/200 30/70/110/150/190/230
    • COOLDOWN : 16/14/12/10/8 seconds 16/14/12/10/8/6 seconds
    • SLOW : 30/35/40/45/50% 30/35/40/45/50/55%
  • 25px Q - Shock Blast
    • DAMAGE : 60/115/170/225/280 70/120/170/220/270/320
  • 25px W - Lightning Field
    • DAMAGE : 100/170/240/310/380 100/160/220/280/340/400
  • 25px W - Hyper Charge
    • DAMAGE MULTIPLIER : 70/80/90/100/110% 70/78/86/94/102/110%
    • COOLDOWN : 13/11/9/7/5 seconds 13/11.4/9.8/8.2/6.6/5 seconds
  • 25px E - Thundering Blow
    • DAMAGE : 8/11/14/17/20% of target's maximum health 8/10.4/12.8/15.2/17.6/20% of target's maximum health
    • COOLDOWN : 14/13/12/11/10 seconds 15/14/13/12/11/10 seconds
  • 25px E - Acceleration Gate
    • MOVEMENT SPEED BONUS : 30/35/40/45/50% movement speed 30/35/40/45/50/55% movement speed
  • 25px R - Transform
    • [NEW] NATURAL TRANSFORMATION : Old level-up benefits now given at levels 6/11/16


Hyper Charge has been slightly reduced in its total attack damage scaling at later ranks.

"For a guy so strong when it comes to long-range combat, it doesn't make the most sense that he should blow you up in close-quarters without the use of his hammer. Lowering Hyper Charge's late-game shenanigans should keep even the most fed Jayce's out there from getting too unfair. It's also unfair for him to be that good looking, but that's not something we can nerf."
  • 25px W - Hyper Charge
    • DAMAGE PER ATTACK : 70/85/100/115/130% total attack damage 70/80/90/100/110% total attack damage

"Before this change, you could activate Hyper Charge, wait a bit, then Double Hyper Charge someone, doing 'The Most Damage In League of Legends' (maybe?). It was unintended and kind of goofy."
  • 25px W - Hyper Charge
    • LESS HYPER, MORE CHARGE : Hyper Charge now goes on cooldown after the third shot rather than right on cast
    • COOLDOWN : 14/12/10/8/6 seconds 13/11/9/7/5 seconds

v3.09 By increasing the cooldown on Jayce's Acceleration Gate, we can keep his Shock Blast + Acceleration Gate combo impactful while toning down his poke and disengage potential. In addition, since later in the game not every Shock Blast will be accelerated, we've increased the base speed of the ability to make it better as a standalone skillshot.

  • Shock Blast
    • Basic missile speed increased to 1450 from 1350 (Accelerated Shock Blast missile speed remains the same)
  • Acceleration Gate
    • Cooldown increased to 16 seconds from 14/13/12/11/10


  • Base Movement Speed increased by 25.


  • Thundering Blow
    • No longer deals any flat base damage. Still deals % max health damage and has a bonus attack damage ratio.
    • Fixed - Stun no longer sometimes last beyond the knockback duration

September 18th - World Championship Hotfix

  • Thundering Blow mana cost increased to 40 / 50 / 60 / 70 / 80 from 40 at all ranks


  • Improved the responsiveness of his basic attacks, primarily in Hammer stance
  • Fixed a bug so that the first basic attack after swapping to Mercury Cannon is now more responsive

 Jayce released


  • 2014

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