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.
Aatrox's Infernal Chains are easier to exit when running towards the sides or at Aatrox.
Aatrox's attacks are very telegraphed, so use the time to dodge the hit zones.
Keep your distance when Aatrox uses his Ultimate to prevent him from reviving.
The stat comparisons shown on this page underscore some influential Karthus vs. Aatrox matchup statistics that may help us explain the differences and similarities between the two. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is better than Aatrox’s KDA ratio of NaN, showing that Karthus may be more central to his team's team fighting potential than Aatrox..
Karthus often has a similar longest kill spree as his matchup does. Commonly, he receives less damage than Aatrox. This is usually reflective of different amounts of tankyness, yet it can also show that the champ with increased HP has less agility and thus is not able to kite away from further damage when engaged or poked.
Both LoL champs are great. Both champs have their pros and cons. In League's current meta, Karthus usually loses when facing off against Aatrox, with a 45.0% win rate. Thus, Karthus makes a bad counter for Aatrox.
While Karthus does have a much lower win rate compared to Aatrox, when they face off with one another, Karthus also has a much greater level of difficulty that makes him a more time consuming champ to pick up and master. You should expect to face a difficult match when picking Karthus into Aatroxas his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Additionally, Karthus has some amount of utility and CC, a similar amount to Aatrox. This often 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 for every situation in League of Legends, in Karthus vs Aatrox matchups, Aatrox is the better champion with a much lower win rate, more champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Karthus is a bad counter for Aatrox. Focus your gameplay on keeping up your gold and cs and clearing objectives. If you do that, you should hold your own as Karthus against Aatrox.
If you would like to truly master Karthus in order to counter Aatrox during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tricks and insights into this matchup. If you listen to the build and suggestions presented above, you should grow your win rate by a lot and be closer to League of Legends pro players.
Karthus most often accumulates less CS relative to Aatrox. Champions who typically don't earn much CS usualy don't need much CS to be effective, such as sup champs. 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, usually have to have a lot of items to be effective. In either situation, try to do better than the numbers shown on this page to do well.
The top items to focus on in your Karthus versus Aatrox build include Rabadon's Deathcap, Shadowflame, and Stormsurge. When Karthus used at least these three pieces in his build, he performed much better against Aatrox than with most other commonly used builds. In fact, Karthus had an average win rate of 45.0% when playing against Aatrox with this counter build.
To have the best chance of crushing Aatrox 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 runes that we analyzed for Karthus vs Aatrox clashes, this combination of runes yielded the best win rate. Notably, these runes averaged a 45.0% win rate overall.
If you want to get Karthus x Aatrox tips and counter stats for a a particular division rank, please select one from the selection menu provided above. By default, the stats and build suggestions displayed are computed using all rounds played with both champs.