User blog comment:StrategicMagic/Vayne - Carry? Yes. AD? No./@comment-5266525-20120819110651/@comment-5009341-20120819125404

u can counter vayne by AS-debuffs: frozen heart, raduins,

if both applied, u will reduce vaynes TOTAL as by 52% (meaning: (baseAS*bonusAS)*ASdebuff)

e.g.:

vayne has 1 attack per second, with both debuffs she will attack 0.48 times every second