Jax

Innate: Jax's basic attacks generate a stack of Relentless Assault on-attack for 2.5 seconds, refreshing on subsequent attacks and stacking up to 8 times. Stacks expire one by one every 0.25 seconds when the duration ends.
Relentless Assault: For each stack, Jax gains 5 – 14 for 7 (based on level) bonus attack speed, up to a maximum of 40 – 112 for 7 (based on level).
Grandmaster at Angling: While out-of-combat with champions and idle in the river for 10 seconds, Jax will occasionally catch a fish, granting him 1 gold and 1 ability power for 5 seconds. He catches a fish at an average rate of one every 15 seconds. He also has a 5% chance to catch a rare fish that grants 10 gold and 10 ability power for 5 seconds.