• Leap Strike procs spell vamp and Rylai's slow similarly with all single target spells and abilities with full effect.
• Leap Strike pops Spell Shield.
• Leap Strike will not damage  Black Shield.
• Leap Strike does not proc on-hit effects.
  • However, it does proc Jax's  Empower if he has the buff active.
• Jax can still be affected by crowd control effects while using Leap Strike.
• Jax can still use abilities and spells while jumping with Leap Strike.
• Leap Strike can be used to jump over terrain, provided that there is enough room for Jax on the other side.
  • Damage is dealt whether Jax jumps to his target or not, as long as the target was in range upon cast.
• Leap Strike can be used on wards, temporarily revealing it for 2 seconds afterwards.
• Leap Strike can sometimes appear to be able to be cast on something that appears to be outside of the ability's range, most notably, wards placed over terrain. Examples can be seen in this video demonstration.

• Empower procs on-hit effects.
• Empower procs spell vamp and Rylai's slow similarly with all single target spells and abilities with full effect.
• Empower pops Spell Shield.
• Empower will damage  Black Shield but the physical damage from the autoattack still bypasses it.
• Empower resets Jax's attack timer on cast.
• The buff granted by Empower will not be consumed on attacking structures such as turrets. However Jax can still use the ability to reset his autoattack timer (and therefore do more damage to the structure).
• Empower can proc and apply effects from items like Sheen.
• If Jax uses Leap Strike while buffed by Empower, the buff will proc and be consumed to deal the bonus magic damage.

• Counter Strike does not proc on-hit effects.
• Counter Strike procs spell vamp and Rylai's slow similarly with all area of effect spells and abilities with diminished effect.
• Counter Strike pops Spell Shield.
• Counter Strike will not damage  Black Shield and the stun is negated.
• Jax will always stun surrounding enemies, even if he is suffering from crowd control effects when the dodge buff ends.
  • This can be used to interrupt Warwick's  Infinite Duress and Malzahar's  Nether Grasp.
• Counter Strike's damage is increased by 20% for each attack dodged, capping at 100%.
• Counter Strike can dodge abilities that proc on-hit effects, such as:
  • Fiora's  Blade Waltz
  • Gangplank's  Parrrley
  • Ezreal's  Mystic Shot
• Counter Strike will not dodge some auto-attack modifier abilities, such as:
  • Nasus's  Siphoning Strike
  • Sona's  Power Chord
• Note that upon first activation Counter Strike will go on a 1 second cooldown before it can be activated again to proc the stun earlier.

When activated, Grandmaster's Might is a self-target ability that grants Jax bonus armor and magic resist for 8 seconds.

• The magic damage from Grandmaster's Might procs spell vamp and Rylai's slow similarly with all single target spells and abilities with full effect.
• The magic damage from Grandmaster's Might will damage  Black Shield.
• The magic damage from Grandmaster's Might will not damage Turrets. Attacks against turrets still count towards his passive but the extra magic damage will only be used when hitting a non-turret opponent.
• Activating Grandmaster's Might has no cast time and does not interrupt Jax's previous orders.
• Grandmaster's Might only calculates the bonus armor and magic resist once, at the moment the ability is cast. Changes to his stats while Grandmaster's Might is active will not cause the bonus to adjust.