Mordekaiser should control the lane by forcing extended trades where his passive damage and (W) shield sustain outvalue Jayce's poke and burst.
Prioritize denying Jayce's ranged poke advantage and avoid giving him free tempo to snowball early lane pressure.
Trading pattern
Initiate trades by threatening (E) pull to catch Jayce out of position and follow up with isolated (Q) for maximum damage.
Extend trades only when Mordekaiser's passive is active and (W) shield is available to outlast Jayce's burst.
Punish Jayce after he commits hammer form (Q) or misses empowered (Q) poke by engaging while his escape and poke cooldowns are down.
Danger windows
Be cautious when Jayce has empowered (Q) through (E) ready, as his ranged poke can chunk Mordekaiser before trades.
Avoid engaging when Jayce has hammer form available, especially his (E) knockback, which can disrupt Mordekaiser's pull and trade pattern.
After missing (E), Mordekaiser's threat drops significantly; avoid walking forward without engage tools to prevent punishment.
Early game
Use early levels to position for (E) pulls, aiming to isolate Jayce for (Q) damage before he can safely poke from range.
Avoid walking into Jayce's empowered (Q) through (E) poke by respecting his cooldowns and wave state.
Maintain a slow pushing wave to keep Jayce within (E) pull range and force him into unfavorable trades.
Power spikes
At level 6, use (R) to isolate Jayce and force a duel he cannot kite, maximizing kill pressure.
After first AP bruiser item, force longer trades where sustained damage and shield healing outvalue Jayce's burst.
Respect Jayce's first damage item spike by playing around his empowered (Q) poke and avoid extended trades when his poke is up.
Win conditions
Use wave control and (E) pull pressure to force Jayce into extended trades where Mordekaiser's passive and (W) shield dominate.
At level 6, isolate Jayce with (R) when he cannot kite or call for help to secure kills or force summoner spells.
Deny Jayce scaling by controlling lane tempo and forcing unfavorable trades post-item spikes, then transition to side lane duels or teamfights where Mordekaiser excels.
Tip: For Mordekaiser vs Jayce, read overview, trading pattern, and danger windows first for a fast Top lane check.
