Gangplank

Too much AD, in the early stages will force you to leave the mid for other lines, where you will be kicked out in a bad case

Tristana

From an early stage of the game, you will be punished for any approach to creeps and not given a chance to win, in a leyte with 3+ things, you will be killed in 5 shots

Zed

Be afraid of Zed at level 3 and 6. His damage increases several times with the acquisition of key abilities and does not allow you to legally approach the creeps, but when he spends his "W", do not be afraid to approach the creeps and get your things

Talon

A lot of damage at an early stage and will kill you very often on the line if you are greedy

Irelia

Do not fight under the creeps with her and do not let her get 4 stacks of passivity, she is strong at an early stage against Kassadin, but in leyte you will punish her

Renekton

Punishes Kassadin for every approach to creeps, a lot of omnivamp and stun

Lucian

He will punish for every approach to creeps and around them, he has an excellent poлу potential, survive the early stage of the lane stage and in the future you will win the game

Fizz

Too much AP, but in the late game, after receiving Zhonya's, you interrupt him

Graves

A lot of AD, little survivability and highly vulnerable to ganges

Jayce

Poke and even more Poke, rely on the forester and your 6 lvl on which you kill him

Lee Sin

Lee Sin has explosive damage at the beginning, which prevents Kassadin from living on the line and scaling into late

Riven

Will not let Kassadin live on the line, as it has a lot of damage and survivability from the early to the middle stage of the game

Yasuo

Unpleasant in the early and middle games, there are a lot of opportunities to evade the Kassadin ult, a lot of damage from buying the first thing

Malzahar

The nasty "R" that turns you out of the fight

Akshan

A hero capable of turning the tide of battle, going into invisibility and walking along the lines, gives early aggression to the team, which is very bad for Kassadin

Yone

A lot of damage, Tower dive, unpleasant control and excessive survivability

Pantheon

High damage, target control, unpleasant survivability

Kennen

When Kennen catches you in a fight, it will be very painful and unpleasant for you, a nasty hero who can turn you off from the fight

Lulu

To scale into the leit and helps the team, try not to let it get too impudent

Qiyana

One shot machine, will find and nail to the wall, underestimate its strength, it has a very large damage allowing you to turn over team fights

Viktor

Vex

Anivia

Neeko

LeBlanc

Annie

Malphite

Ahri

Ekko

Galio

Akali

Azir

Lissandra

Lux

Rumble

Ryze

Soraka

Swain

Syndra

Twisted Fate

Orianna

Sylas

Kayle

Aurelion Sol

Katarina

Heimerdinger

Karthus

Lillia

Taliyah

Zoe