Active: For up to 2 seconds, Jax dodges all basic attacks and takes 25% less damage from area of effect abilities. At the end of the duration or if Counter Strike is activated again, Jax deals physical damage and stuns nearby enemies for 1 second. This spell deals 20% additional damage for each attack dodged to a maximum of 100% increased damage.
Grandmaster's Might has no cast time and does not interrupt Jax's previous orders.
Despite being an on-hit effect, Grandmaster's Might's damage will trigger spell effects as a single-target spell, including spell vamp, Rylai's slow and will cause Muramana's bonus damage to trigger twice with one autoattack.
Although the bonus damage cannot affect structures, hits against them will still increment the counter, resulting in Jax repeatedly triggering the loud sound effect after three strikes.
The bonus armor and magic resistance is calculated when the ability is cast. Further changes to Jax's attack damage and ability power will not cause the bonus stats to dynamically adjust.