The newest keystone, Hail of Blades, hit the Public Beta Environment on Thursday evening. It rests nicely in the Domination tree. Thanks to Moobeat and friends over at Surrender@20, we have a good idea of how this new keystone works and what it looks like.
Hail of Blades grants you scaling attack speed (starting at 50 percent and going up to 100) for your first three basic attacks against an enemy champion. The rune requires you to be out of combat for five full seconds before it can proc again. However, Hail of Blades will allow you to exceed the attack speed limit.
For attack speed heavy champions like Kog’Maw and stacking champions like Kai’Sa, Hail of Blades has a very promising future. That’s currently all we know about this rune. While it could launch in 8.10, a change of this magnitude is far more likely to stay on the PBE for a few cycles.