Requested Varus buff.
Passive: On a minion or monster kill or crit, Varus gains 20% attack speed for 3 seconds. On a champion kill, assist or crit on a champion, Varus gains 40% attack speed for 6 seconds. These bonuses do not stack with themselves.
Passive: Varus' basic attacks deal bonus magic damage. They also apply Blighted Quiver Blight for 6 seconds, stacking up to 3 times. On-hit Magic Damage: 10 / 14 / 18 / 22 / 26 (+ 25% AP) Varus' other abilities and critical strikes detonate Blight, dealing magic damage equal to a percentage of the target's maximum health per stack (capped at 360 against monsters).
Basically asking that critical strikes count towards Varus' passive and W.