Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
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.
Ahri's survivability is dramatically reduced when her Ultimate, Spirit Rush, is down.
Stay behind minions to make Charm difficult to land, this will reduce Ahri's damage potential significantly.
The stat comparisons provided here highlight some important Kassadin against Ahri matchup stats that can help us explain the distinctions between the pair. For instance, Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is more than Ahri’s KDA ratio of NaN, highlighting that Kassadin may be more central to his team's team fighting potential than Ahri..
Kassadin normally has a similar longest kill spree as his counter does. Typically, he receives more damage than Ahri. This is usually reflective of different amounts of tankyness; however, it can also imply that the champion with more health has less agility and thus is not able to kite away from further harm when poked or engaged.
Both League of Legends champs are great. Both champs have their pros and cons. In the game's current meta, Kassadin usually loses when taking on Ahri, with a 47.1% win rate. Thus, Kassadin makes a poor counter for Ahri.
While Kassadin does have a lower winrate than Ahri, when facing one another, Kassadin also has a much greater level of difficulty that makes him a more difficult character to learn and master. You may get destroyed when picking Kassadin into Ahrias his relative depth means that you may not be able to reach his full potential without a significant amount of practice beforehand.
Furthermore, Kassadin also has some amount of utility and CC, a similar amount to Ahri. This often makes her just as valuable during team fights, especially when fighting champions with a lot of burst damage.
While there isn't one best champion overall in League of Legends, in Kassadin vs Ahri matchups, Ahri is the better champ with a lower win rate, more champion depth, and a similar amount of utility to help out your team members during late stage team fights.
Kassadin is a trash counter for Ahri. Make sure you focus your play on keeping up your CS and destroying objectives. If you can do that, you should hold your own as Kassadin against Ahri.
If you would like to truly master Kassadin to counter Ahri during both the laning and mid / late game phases of League of Legends, you should continue reading to learn a few extra tips and tricks for this matchup. If you mind the build and tips displayed above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Kassadin most often picks up a similar amount of CS relative to Ahri. Champions who typically don't get much CS usualy don't have to have much CS to be valuable teammates, such as support champions. These kinds of champions are able to scale well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often need several high cost items to be effective. In either case, try to exceed the numbers displayed here to do well.
The most crucial items to prioritize in your Kassadin versus Ahri build consist of Crown of the Shattered Queen, Rabadon's Deathcap, and Zhonya's Hourglass. When Kassadin used at least these three items in his build, he did significantly better versus Ahri than with most other common counter builds. In fact, Kassadin boasted an average winrate of 47.1% when countering Ahri with these items in his kit.
To have the highest probability of defeating Ahri as Kassadin, Kassadin players should use the Electrocute, Taste of Blood, Eyeball Collection, Ultimate Hunter, Presence of Mind, and Legend: Tenacity runes from the Domination and Precision rune sets. Out of all the rune builds players chose for Kassadin vs Ahri LoL games, this combo of runes resulted in the highest win rate. Notably, these runes provided a 47.1% winrate overall.
If you would like to get Kassadin vs Ahri tips and counter builds for a a particular rank, please choose one from the selection menu above. If viewing for the first time, the stats and strategies displayed are calculated using all matches run with both champions.