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.
When you see Tahm Kench use the shield from Thick Skin, remember that he just opted out of a good deal of healing. He will also not accumulate new gray health until Thick Skin comes off cooldown. Use this to your advantage!
Watch out for Kench's Abyssal Dive - you can cancel it's channel with immobilizing crowd control effects.
The stats shown here feature several strategic Karthus versus Tahm Kench matchup stats that may help you grasp the differences between this pair of champions. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is more than Tahm Kench’s KDA ratio of NaN, showing that Karthus may be more central to his team's team fighting potential than Tahm Kench. This observation is in large part caused by the differences in deaths.
Karthus often has a similar longest killing spree as his opponent does. Typically, he receives less damage than Tahm Kench. This commonly reflects different amounts of tankyness, yet it can also indicate that the champion with more HP has less agility and thus is unable 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 League's current meta, Karthus usually loses when playing against Tahm Kench, with a 42.1% win rate. Therefore, Karthus makes a poor counter to Tahm Kench.
While Karthus does have a much lower winrate than Tahm Kench, when they face off with one another, Karthus also has a greater difficulty level that makes him a more challenging character to pick up and master. You may get destroyed when picking Karthus into Tahm Kenchas his relative depth means you may not be able to reach his full potential without a lot of practice beforehand.
Additionally, Karthus has some amount of utility and CC, a similar amount to Tahm Kench. This makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there is not a single best champion overall in League of Legends, in Karthus vs Tahm Kench matchups, Tahm Kench is the better champion with a much lower win rate, more champion depth, and a similar amount of utility to help out your team members during team fights.
Karthus is a bad counter for Tahm Kench. Make sure you focus your play on increasing your CS and clearing objectives. If you do that, you should hold your own as Karthus against Tahm Kench.
If you would like to truly master Karthus to counter Tahm Kench during both the lane and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tricks and insights into this matchup. If you pay attention to the build and suggestions shown above, you will increase your win rate significantly and be that much closer to League of Legends pro players.
Karthus most often gets a similar amount of CS relative to Tahm Kench. Champs who on average don't acquire many minion kills typically don't need much CS to be valuable teammates, such as supports. These kinds of champions are able to scale well off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually require a lot of items to be effective. In either situation, try to exceed the numbers shown here to do well.
The best items to prioritize in your Karthus versus Tahm Kench build include Rabadon's Deathcap, Malignance, and Stormsurge. When Karthus combined at least these three items in his build, he performed significantly better versus Tahm Kench than with many other common item sets. In fact, Karthus boasted an average win rate of 42.1% when countering Tahm Kench with this build.
To have the highest chance of defeating Tahm Kench as Karthus, you should equip 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 used for Karthus vs Tahm Kench fights, this mix of runes yielded the best win rate. Moreover, these runes gave a 42.1% winrate overall.
By default, tips, stats, and builds on how to beat Tahm Kench as Karthus are given for all ranked divisions. If you want to narrow the stats and builds to a particular division, you may use the selection menu located above.