Passive: Jax's basic attacks increase his Attack Speed by 6/10/14% for 2.5/2.5/2.5 seconds (max 10 stacks). Every third consecutive attack deals 140/170/210 (+0.7) bonus magic damage.
Active: Jax's speed allows him to reduce incoming magic damage. For 5/6.5/8 seconds his Magic Resist is increased by 20/35/50 plus his Dodge percent totalling Magic Resist.