Talk:Thresh/@comment-27249571-20151216033059/@comment-26568697-20151220162858

It has no cooldown. The timer mechanics are completely different from Alpha Strike and Twin Bite.

Right after your last AA, the passive will start charging up. Your next basic attack will 'consume' the charges and deal extra damage according to how long it charged (up to a cap). Then, start over.

If you AA constantly, every AA will apply the minimum bonus damage. In order to deal the highest possible damage with every AA, you should wait and AA when the passive is fully charged.

You can see this in your interface, a small icon appears that changes color over time. When it is red, it's fully charged and the next AA will deal the maximum damage.