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.
When retreating with low health, be prepared to dodge Lux's Final Spark, a red targeting beam fires prior to the main beam, so try to move to the side if possible.
Lux has powerful zone control abilities. Try to spread out and attack from different directions so she cannot lock down a specific area.
The stats shown here clarify some important Kassadin versus Lux matchup statistics that may help us interpret the differences and similarities between the pair. Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is better than Lux’s ratio of NaN, showing that Kassadin may be more central to his team's team fighting capability than Lux. This observation is largely caused by the difference in kills.
Kassadin normally has a slightly larger longest killing spree than his foe does. Typically, he receives more damage than Lux. This often reflects differing health capacities; however, it can also illustrate that the champion with higher health has less mobility and thus is not able to flee from further harm when poked or engaged.
Both LoL champs are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Kassadin usually fairs equally well when facing off against Lux, with a 50.6% win rate. Thus, Kassadin makes an ok counter for Lux.
While Kassadin does have a higher winrate compared to Lux, when on opposite teams, Kassadin also has a much greater difficulty level that makes him a more complex champion to pick up and master. You still need to be cautious when picking Kassadin into Luxas his relative depth means you may not be able to unleash his full potential without a lot of practice beforehand.
Additionally, Kassadin has some amount of CC and other utility, a similar amount to Lux. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there is not a single best champion in League of Legends, in Kassadin vs Lux matchups, Kassadin is the better champ with a similar win rate, more champion depth, and a similar amount of utility to help out your allies during team fights.
Kassadin is a decent counter for Lux. Focus your play on keeping up your gold and cs and destroying objectives. If you do that, you should be able to stand on your own as Kassadin against Lux.
To truly master Kassadin in order to counter Lux during both the early game and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tips and tricks for this matchup. If you pay attention to the build and tips presented above, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Kassadin often gets more CS compared to Lux. Champs who on average don't get many minion kills often don't need much CS to be effective, such as sup champs. These kinds of champions are capable of scaling well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often need many items to be effective. In either case, try to exceed the values displayed on this page to do well.
The most important items to have in your Kassadin versus Lux build include Rabadon's Deathcap, Void Staff, and Rod of Ages. When Kassadin incorporated at least these three pieces in his build, he performed much better versus Lux than with most other typical builds. In fact, Kassadin had an average win rate of 50.6% when playing against Lux with these items in his kit.
To have the best chance of vanquishing Lux as Kassadin, Kassadin players should use the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Of all the rune sets players picked for Kassadin vs Lux counters, this sequence of runes yielded the highest win rate. Moreover, these runes provided a 50.6% winrate overall.
If you need to get Kassadin versus Lux tips and matchup stats and build suggestions for a a specific division rank, feel free to choose one from the selection menu shown above. If viewing for the first time, the stats and strategies given are calculated using every match with data with both champions.