From the linked post:
"I found two links in the Chinese LoL website. One is for his abilities and one is for his background story. I am not going to bother translating the story but I will translate the abilities. Please remember that this could be fake, however it does look possible so I am just translating what I see.
Source link(It is in Chinese):
http://lol.uuu9.com/201206/407876.shtmlPassive: Hextech electricity(energy?): Every time Jayce transform, he gain 40 bonus MS and ignores unit collision for 1.25 second.
Gate of speed - Jayce summon a gate boosting the MS of all friendly champions passing through the gate. If energy pulse goes through the gate, it gains increased damage/range/projectile speed.
Energy charge- Jayce charge his energy and gain attack speed, the buff goes away after a few attacks.
Mordin hammer: Transform the Mordin cannon into the Mordin hammer, gains passive armor and magic resist with new abilities.
Mordin cannon: Transform the Mordin hammer into the mordin cannon, gaining new abilities and range increase.
Lightening field: Passive: Gain mana when Jayce auto attacks an unit.
Active: Create a lightening field doing DoT damage to surrounding enemies.
Thunderstrike - Does magic damage based on X% of target's max hp, knocks away the target.
Thunderleap - Jump to target area, deals physical damage and apply slows to surround enemies.
This is a very crude translation and I have to make up the names, but you should get the gist.
PS: I know there is no ability called energy pulse, but the name is definitely different from all the abilities listed in Chinese. So I just translated what is written.
PPS: Energy pulse could be any of his abilities instead of a specific one."