Heads up! We have done a partial reset of votes for season 4! You can now make new votes!

Kassadin

The Void Walker

Mage
Magical Damage
Mid

General counter information:

Build TenacityDeny FarmDodge AbilitiesHard CCOutsustain Play aggressive early game

Counter Items & Summoner Spells:

Health Points: 433 (+78 / per level) Health Regen: 6.95
Mana Points: 230 (+45 / per level) Mana Regen: 30
Damage: 52.3 (+3.9 / per level) Attack Speed: 0.638 (+3.7 / per level)
Attack Range: 125 Movement Speed: 315
Armor: 14 (+3.2 / per level) Magic Resistance: 30 (+1.25 / per level)
Influence Points (IP): 3150 Riot Points (RP): 975

Void Stone

Passive

Kassadin takes 15% reduced magic damage after magic resistance reductions have been applied. Kassadin ignore's unit collision.

Null Sphere

Q

Active: Kassadin fires an ethereal bolt of void energy to a single target, dealing magic damage and Granting Kassadin a shield for 1.5 seconds.
Cooldown: 9 seconds
Range: 650
Projectile Speed: 1400

Cost: 70/75/80/85/90 mana
Magic Damage: 80/105/130/155/180 (+0.7 per ability power)
Shield: 40/70/100/130/160 (+0.3 Ability Power)

Nether Blade

W

Passive: Kassadin's basic attacks draw energy from the void, dealing 20 (+0.1 ability power) bonus magic damage.
Active: Kassadin charges his Nether Blade, causing his next basic attack to deal bonus magic damage and restore a percentage of his missing mana.
Cost: no cost
Cooldown: 6 seconds

Mana Restored: 4/5/6/7/8% (20/25/30/35/40% against champions).
Magic Damage: 40/65/90/115/140 (+0.6 ability power)

Force Pulse

E

Active: Kassadin draws energy from spells cast in his vicinity, gaining a charge whenever a spell is cast near him, including his own spells. Upon reaching 6 charges, Kassadin can use Force Pulse to deal magic damage and slow enemies in a cone in front of him for 3 seconds.
Cost: 80 mana
Cooldown: 6 seconds
Range: 400
Cone Width: 80 degrees

Magic Damage: 80/105/130/155/180 (+0.7 ability power)
Slow: 30/35/40/45/50 %

Riftwalk

R

Active: Kassadin blinks to a nearby location, dealing magic damage to enemy units surrounding the destination area. Each subsequent Riftwalk in the next 12 seconds will cost double it's cost mana per stack and will deal additional damage. The cost and damage increase can stack up to 4 times.
Base Cost: 75 mana
Range: 700
Radius of Damage AoE: 150

Cooldown seconds: 7/5/3
Base Magic Damage: 80/100/120 (+2% of maximum mana)
Additional Damage Per Stack: 40/50/60(+1% of maximum mana)


Counter Tips

Try to disable (stun/snare/knock-up) him if he uses his Riftwalk aggressively.
Buying a Banshee's Veil will significantly lower the damage you take from his skill combos.
Kassadin gets completely countered by AD damage early game due to him being melee and having a passive only strong against AP.