Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
Consider playing a bit more cautiously around Kennen when you have a Mark of the Storm debuff. If he hits you with 3 Marks of the Storm, you will get stunned.
Kennen is flimsy by nature - turn and attack him if he gets careless with Lightning Rush.
The stat comparisons shown here highlight some important Karthus versus Kennen counter stats that may help us distinguish the distinctions between this set of champs. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kennen’s KDA ratio of NaN, indicating that Karthus may be more central to his team's team fighting effectiveness than Kennen..
Karthus typically has a similar longest killing spree as his foe does. Commonly, he receives more damage than Kennen. This typically indicates different amounts of tankyness; however, it can also hint that the champ with increased HP has less agility and thus is unable to escape additional damage when engaged or poked.
Both League of Legends champions are great champions. Both champs have their pros and cons. In League's current meta, Karthus usually fairs equally well when facing off against Kennen, with a 50.4% win rate. Thus, Karthus makes an ok counter for Kennen.
While Karthus does have a higher win rate than Kennen, when on opposite teams, Karthus also has a much greater learning curve that makes him a more challenging champ to pick up and master. You still need to be cautious when picking Karthus into Kennenas his relative depth means that you may not be able to unleash his full potential without a lot of practice beforehand.
Furthermore, Karthus has some amount of utility and CC, a similar amount to Kennen. This often makes her just as valuable during teamfights, especially when trying to counter champions with a lot of burst damage.
While there isn't one best champion for every situation in League of Legends, in Karthus vs Kennen matchups, Karthus is the better champ with a similar win rate, more champion depth, and a similar amount of utility to help out your allied champions during teamfights.
Karthus is a decent counter to Kennen. Make sure you focus your gameplay on maximizing your gold and cs and taking out objectives. If you are able to do that, you should do very well as Karthus against Kennen.
If you would like to truly master Karthus in order to counter Kennen during both the lane and mid / late game phases of League of Legends, you should continue reading to learn a few extra tricks and insights into this matchup. If you pay attention to the build and suggestions displayed above, you will grow your win rate by a lot and be that much closer to League of Legends pro players.
Karthus usually gets less CS compared to Kennen. Champions who typically don't get many minion kills usualy don't need much CS to be valuable teammates, such as supports. They are capable of scaling properly off of their skills, stats, and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically need many items to be effective. In either case, try to surpass the values displayed on this page to do well.
The top items to prioritize in your Karthus versus Kennen build consist of Rabadon's Deathcap, Malignance, and Shadowflame. When Karthus combined at least these three items in his build, he performed much better when facing Kennen than with many other commonly used item sets. In fact, Karthus had an average winrate of 50.4% battling Kennen with this counter build.
To have the greatest probability of crushing Kennen as Karthus, Karthus players should use the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Eyeball Collection, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune builds players chose for Karthus vs Kennen matchups, this mix of runes yielded the best win rate. Moreover, these runes gave a 50.4% winrate overall.
By default, tips, stats, and builds on how to beat Kennen as Karthus are displayed for all skill levels, merged. To narrow the statistics and builds to a particular rank, you can use the selection menu located above.