Talk:Nasus/@comment-6313572-20130412012449/@comment-4696002-20130417141145

Basically the AS decrease will grow by 1.5% / 3% / 4.5% / 6% / 7.5% per second with a base of 17.5% AS decrease and a max AS decrease of 23.5% / 29.5% / 35.5% / 41.5% / 47.5%.

This is not a late-game buff, as current AS debuff slows for double of that. It's quite a serious nerf but a 35%-95% AS slow is obnoxiously strong in S3.