Basic attacking an enemy champion grants 110% bonus Attack Speed for your next 3 basic attacks. While active, Hails of Blade removes the attack speed cap.
Hail of Blades lasts 3 seconds, and each basic attack refreshes the duration to 2 seconds.
Attempting to broaden Hail of Blades' use cases since it's currently taken specifically by junglers who can chain their CC abilities with their basic attacks.
MAXIMUM TIME BETWEEN ATTACKS :  ⇒ 3 seconds
COOLDOWN : [4 seconds out of combat] ⇒ 8 seconds
Attack speed bonus higher early; lower late. Attack resets no longer consume a stack.
Part of the reason Hail of Blades historically struggled to find a niche is that if you were a champion who cares about attack speed, you usually wanted to go Precision instead. Rune stats solved this tension but left a second unaddressed: Champions who want to open fights with quick bursts of attacks have reset abilities that overlap with one of Hail's empowered attacks. We're changing Hail of Blades to synergize—rather than compete—with attack resets.
ATTACK SPEED BONUS : [75-125% (levels 1-18)] ⇒ 110% at all levels
HAILSTORM Attacks that benefit from an attack reset (ex. Jax's Empower) no longer consume a Hail of Blades stack
Out of combat cooldown decreased. Maximum time between attacks increased.
Hail of Blades isn't a top keystone for any champion right now. We're lowering its cooldown to up its potency on champions who prefer staggered, short trades.
OUT OF COMBAT COOLDOWN :  ⇒ 4 seconds
MAXIMUM TIME BETWEEN ATTACKS : [1.5] ⇒ 2 seconds
We're still watching players experiment with Hail of Blades on different champs and builds. Its list of users is turning out to be narrower than expected, but its underwhelming power level isn't doing much to encourage players to experiment. We're giving it a booster shot for now and will evaluate potential mechanical shifts based on the results.
BONUS ATTACK SPEED : [50-100%] ⇒ 75-125%
One of the goals of runes is to give champions options about what tree they go into based on how they want to play. Domination is a tree about burst, which should make it appealing to some of the burstier marksmen, but there is no real keystone for them. Hail of Blades should help spell-based marksmen who want to lay down a swift chunk have a keystone to promote that playstyle.
HAIL OF BLADES : Gain 50-100% (at levels 1-18) attack speed for the first three attacks made against enemy champions.
NOW NOT LATER : If more than 1.5 seconds elapses between attacks this effect will end
CANT STOP WONT STOP : Hail of Blades allows you to temporarily exceed the attack speed limit
COOLDOWN : 5 seconds out of combat