User blog comment:Deshiba/Season 3 Armor and Armor Penetration/@comment-4012115-20121111201632/@comment-4012115-20121111202200

Anyway Frozen heart / Randuin wont become a bad stat cuz AS-Debuffs are still broken OP

AS-Buffs grant you bonus AS based on base attackspeed

AS-Debuff decrease your AS based on your max attackspeed ...

Base AS = 0,7 Attacks per second

+50% AS grant you 0.35 attacks per second

-50% AS decrease your AS by 0.5-1.25 attacks per second (depending on your max AS)