Shock Blast (Q) amplified through Acceleration Gate (E) cuts off his CS early, shoving the lane so he can't stack Siphoning Strike (Q) farm.

Kiting outside Shock Blast (Q) range, whittling him down before Hemorrhage (P) stacks or the Apprehend (E) pull can land, neutralizing his approach entirely.

A dashless melee, he eats Shock Blast (Q) one-sidedly and gets shoved off the lane and poked down before he can build Pit Grit (P) and charge Haymaker (W).

With no dash until Unstoppable Force (R), he's continuously ground down by the Acceleration Gate (E)–Shock Blast (Q) combo and stays behind throughout the lane.

Sion's Decimating Smash (Q) is a stationary charged attack that is easy to sidestep. Jayce can poke from outside its range with Shock Blast (Q) in Mercury Cannon (R) form and knock Sion away with Thundering Blow (E) when he closes in.

Riposte (W) can block Shock Blast (Q)'s damage, but it does not reflect the projectile. Fiora should dodge the Acceleration Gate (E)-empowered shot with Lunge (Q), close the gap, and repeat short trades around Duelist's Dance (P) vitals.

Bladesurge (Q) dashes across minions and champs to close through Shock Blast (Q), then Flawless Duet (E) stun plus Ionian Fervor (P) lifesteal wins the all-in.

Camille uses Hookshot (E) to cross Shock Blast (Q)'s range, then benefits from Tactical Sweep (W)'s outer-cone max-health physical damage and healing. The Hextech Ultimatum (R) prevents Jayce from disengaging and keeps the fight in melee range.

Wind Wall (W) blocks the Shock Blast (Q) projectile empowered by Acceleration Gate (E), not the gate itself. Yasuo can deny Jayce's main poke and use Sweeping Blade (E) to force melee combat against cannon form.

An early Ruthless Predator (W) stun and the two Slice and Dice (E) dashes let him burst down squishy Jayce the instant he engages.