Blight Damage per Stack: 2 / 2.75 / 3.5 / 4.25 / 5% (+0.02% per ability power)
Varus' other abilities detonate Blight, dealing magic damage equal to a percentage of the target's maximum health per stack.
blight quiver,3 stacks with ~500 ap=>35% max health magic damage with any ability that trigger the effect
R--350+500 ap at lv 18
CDR 40%=>54 sec CD
is taht op enough?