The damage type that Jayce deals is mostly Physical Damage.
Jayce's damage type breakdowns as follows:
After casting Transform Jayce gains 40 Movement Speed and can move through units for the next 0.75 seconds.
Hammer Stance: Leaps to an enemy dealing 60/110/160/210/260/310 (+120% bonus Attack Damage) physical damage to nearby enemies and slowing them by 30/35/40/45/50/55% for 2 seconds.Cannon Stance:Jayce fires an orb of electricity that detonates upon hitting an enemy or reaching the end of its path, dealing 55/110/165/220/275/330 (+120% bonus Attack Damage) physical damage to all enemies around them.
Hammer Stance: Passive: Gains 10/12/14/16/18/20 Mana per strike while in Hammer Stance.Active: Creates an electric aura dealing 100/160/220/280/340/400 (+100% bonus Ability Power) magic damage over 4 seconds to nearby enemies.Cannon Stance: Jayce gains a burst of energy, increasing Attack Speed to maximum for 3 attacks. These attacks deals (70/78/86/94/102/110% bonus Attack Damage) damage.
Hammer Stance: Deals 8/10.8/13.6/16.4/19.2/22% of the target's maximum health (+100% bonus Attack Damage) as magic damage and knocks them back a short distance. (200/300/400/500/600/700 Maximum Damage against monsters)Cannon Stance: Deploys an Aceleration Gate increasing the movement speed for 30/35/40/45/50/55% of all allied champions who pass through it. If Shock Blast is fired through the gate the missile speed, range and damage will increase by 40%.
Active: Transforms the Mercury Hammer into the Mercury Cannon gaining new abilities and ranged attacks.The next attack in Cannon Stance reduces the target's Armor and Magic Resist by 5/15/25/35% (+7.5% bonus Attack Damage) for 5 seconds.
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