Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
Karthus can cast spells for a short duration after he is killed. Move away from his corpse to be safe.
Make sure you always have enough health to survive Requiem, even if you have to go back to the base more frequently to heal.
The stat comparisons provided here underscore some influential Kassadin versus Karthus matchup statistics that can help you interpret the differences between the two. Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is better than Karthus’s ratio of NaN, indicating that Kassadin may be more central to his team's team fighting effectiveness than Karthus..
Kassadin usually has a slightly larger longest kill spree than his foe does. Commonly, he receives more damage than Karthus. This typically indicates different amounts of tankyness; however, it can also hint that the one champion has less mobility and thus is unable to flee from additional harm when engaged or poked.
Both LoL champs are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Kassadin usually wins when facing off against Karthus, with a 51.8% win rate. Therefore, Kassadin makes a good counter for Karthus.
While Kassadin does have a higher winrate than Karthus, when on opposite teams, Kassadin also has a greater difficulty level that makes him a more time consuming character to pick up and master. You still need to be cautious when picking Kassadin into Karthusas his relative depth means you may not be able to unleash his full potential without a lot of practice beforehand.
Additionally, Kassadin also has some amount of utility and CC, a similar amount to Karthus. This often makes her just as valuable during teamfights, especially when fighting champions with a ton of burst damage.
While there is not one best champion for every situation in League of Legends, in Kassadin vs Karthus matchups, Kassadin is the better champion with a higher win rate, more champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Kassadin is a decent counter for Karthus. You will do well by focussing your gameplay on maximizing your gold and cs and taking out objectives. If you can do that, you should be able to stand on your own as Kassadin against Karthus.
If you would like to learn all of the intricacies of Kassadin in order to counter Karthus during both the laning and mid / late game phases of League of Legends, you should keep reading to gather a few extra lessons on this matchup. If you listen to the build and tips displayed here, you should increase your win rate by a lot and be closer to League of Legends pro players.
Kassadin usually picks up more CS relative to Karthus. Champions who typically don't get much CS typically don't require much CS to be valuable teammates, such as sup champs. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, typically require many items to be effective. In either case, try to surpass the values displayed on this page to do well.
The most crucial items to use in your Kassadin versus Karthus build include Rabadon's Deathcap, Malignance, and Rod of Ages. When Kassadin bought at least these three pieces in his build, he did significantly better against Karthus than with many other common builds. In fact, Kassadin had an average win rate of 51.8% when playing against Karthus with this counter build.
To have the highest chance of annihilating Karthus as Kassadin, you should take the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune builds we have analyed for Kassadin vs Karthus face-offs, this sequence of runes resulted in the highest win rate. Notably, these runes gave a 51.8% win rate overall.
By default, tips, statistics, and builds on how to beat Karthus as Kassadin are shown for all skill levels combined. If you would like to filter the stats and builds to a distinct skill level, you may use the selection menu located above.