Talk:Ezreal/@comment-99.60.197.45-20120325162815/@comment-2124153-20120327155254

The correct answer is, you negate his entire Quickdraw AS steroid, plus a little extra, depending on what level he is and how much other bonus AS he's rocking.

In Riot's infinite wisdom, they decided that AS boosts are additive, but debuffs are multiplicative and factored on the final AS. So while Ezreal's W is only +40% on his allies (effectively a free Recurve Bow), on his enemies he will literally cut their attack speed almost in half. This is why it is way, way better to hit enemies with it if you are able to, because it shuts them down completely if they are AS-based.

FYI this effect stacks multiplicatively with other AS reduction, so if you combine the 40% reduction with a 20% from your tank's Frozen Heart, it's a total of -52% AS. GG, HAND.