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.
The stat comparisons shown on this page underscore some influential Karthus vs. Yuumi matchup statistics that can help you understand the differences and similarities between the pair. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Yuumi’s KDA ratio of NaN, demonstrating that Karthus may be more central to his team's team fighting capacity than Yuumi. This observation is in large part a result of the differences in killsdeaths.
Karthus usually has a much larger longest killing spree than his matchup does. Commonly, he receives more damage than Yuumi. This often reflects different amounts of tankyness, yet it can also imply that the one champion has less mobility and thus is unable to kite away from further damage when engaged or poked.
Both LoL champions are great champions. Both champs have their pros and cons. In the game's current meta, Karthus usually fairs equally well when facing off against Yuumi, with a 50.4% win rate. As a result, Karthus makes an ok counter for Yuumi.
While Karthus does have a higher win rate compared to Yuumi, when on opposite teams, Karthus also has a much greater level of difficulty that makes him a more difficult character to learn. You still need to be cautious when picking Karthus into Yuumias his relative depth means you may not be able to reach his full potential without a significant amount of practice beforehand.
Moreover, Karthus also has some amount of utility and CC, a similar amount to Yuumi. 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 a single best champion overall in League of Legends, in Karthus vs Yuumi matchups, Karthus is the better champ with a similar win rate, more champion depth, and a similar amount of utility to help out your allies during teamfights.
Karthus is a decent counter for Yuumi. Focus your gameplay on maximizing your CS and taking out objectives. If you do that, you should do very well as Karthus against Yuumi.
To learn all of the intricacies of Karthus to counter Yuumi during both the lane and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tricks and insights into this matchup. If you mind the build and suggestions presented here, you will increase your win rate significantly and be closer to League of Legends pro players.
Karthus most often gets much more CS compared to Yuumi. Champions who typically don't acquire many minion kills often don't need much CS to be effective, such as sup champs. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually have to have a lot of items to be effective. In either case, try to do better than the values shown on this page to do well.
The ideal items to use in your Karthus versus Yuumi build consist of Malignance, Void Staff, and Liandry's Torment. When Karthus used at least these three items in his build, he performed a lot better when facing Yuumi than with many other commonly used builds. In fact, Karthus had an average winrate of 50.4% when playing against Yuumi with this build.
To have the greatest probability of beating Yuumi 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 combinations players picked for Karthus vs Yuumi counters, this mix of runes resulted in the greatest win rate. Notably, these runes averaged a 50.4% winrate overall.
If you would like to view Karthus x Yuumi tips and counter builds for a a specific skill level, please choose one from the selection menu above. If viewing for the first time, the statistics and build suggestions shown are calculated using all games finished with both champs.