I'd like to introduce myself to you and introduce myself to my Varus Guide. I am ADC Main players on the eune top runner-up I have reached Platinum 1 (perhaps I can even make Diamond for seasons)
My favorite characters: Varus and Twitch.
I'll also do a Twitch guide in the future.
My awards on Varus:

Ranking of the best Varus players on EUNE

Passive : Living Vengeance

Innate: Varus gains 40% (+ 50% bonus attack speed) bonus attack speed for 5 seconds upon an enemy champion takedown, reduced to 20% (+ 25% bonus attack speed) bonus attack speed on minion or monster kills.


Q: Piercing Arrow
TARGET RANGE: 925 - 1625 (based on channel time) SPEED: 1850 COST: 70 / 75 / 80 / 85 / 90 mana COOLDOWN: 20 / 18 / 16 / 14 / 12

First Cast: Varus channels for up to 4 seconds, increasing Piercing Arrow's range and damage over the next 2 seconds. Varus can still move while channeling but is pacified and slowed by 20%.
Piercing Arrow is automatically canceled when the channel ends, refunding half of its mana cost.

Second Cast: Varus fires in the target direction, dealing physical damage to all enemies in the arrow's path, increased by 0% - 50% (based on channel time). The total damage is reduced to 100% - 33% (based on enemy hit) damage.
Minimum Physical Damage:
»
10 / 46.7 / 83.3 / 120 / 156.7 (+ 100% AD)
Maximum Physical Damage:
»
15 / 70 / 125 / 180 / 235 (+ 150% AD)

Detonating Blight stacks on an enemy champion reduces Piercing Arrow's cooldown by 4 seconds.


W: Blighted Quiver

Passive: Varus's basic attacks deal bonus magic damage and apply Blight for 6 seconds, stacking up to 3 times.
Bonus Magic Damage:
10 / 14 / 18 / 22 / 26 (+ 25% AP)
Varus's other abilities consume Blight on enemies upon damaging them, dealing them magic damage for each stack, capped at 360 against monsters.
Magic Damage per Stack:
»
2 / 2.75 / 3.5 / 4.25 / 5% (+ 2% per 100 AP) of the target's maximum health


E: Hail of Arrows
TARGET RANGE: 925 COST: 80 mana COOLDOWN: 18 / 16 / 14 / 12 / 10

Active: Varus fires a hail of arrows that deals physical damage on impact to all enemies in the target area.
Physical Damage:
70 / 105 / 140 / 175 / 210 (+ 60% bonus AD)
The area desecrates the ground for 4 seconds, slowing all enemies standing in it and applying Grievous Wounds.
Slow:
25 / 30 / 35 / 40 / 45%


R: Chain of Corruption
TARGET RANGE: 1075 COLLISION RADIUS: 60 EFFECT RADIUS: 550 TETHER RADIUS: 600 SPEED: 1850 COST: 100 mana COOLDOWN: 110 / 90 / 70

Active: Varus flings out a tendril of corruption that infects the first enemy champion hit, dealing magic damage, rooting them for 2 seconds and applying 3 stacks of Blight over 1.5 seconds.
Magic Damage:
100 / 175 / 250 (+ 100% AP)
On impact, the tendril seeks out nearby enemy champions and forms a tether to them. If the tether isn't broken within 2 seconds, they are rooted, and applied the same effects as the initial target. Tendrils will continue to spread until there are no champions in range that have not already been affected.