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.
Mordekaiser builds up a powerful damage aura when fighting champions, so keep your distance.
Realm of Death will cut you off from your teammates completely. Try to save mobility spells to escape Mordekaiser once inside
Damage he deals can be converted into a large shield, and consumed for health
The stats provided here clarify some important Karthus vs. Mordekaiser counter statistics that may help us distinguish the differences and similarities between the two. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is better than Mordekaiser’s ratio of NaN, demonstrating that Karthus may be more central to his team's team fighting effectiveness than Mordekaiser. This observation is largely caused by the differences in assists.
Karthus typically has a similar longest kill spree as his foe does. Typically, he receives less damage than Mordekaiser. This is usually reflective of different amounts of tankyness, yet it can also illustrate that the champ with more health has less agility and thus is not able to escape additional harm when engaged or poked.
Both League champs are great champions. Both champs have their pros and cons. In League's current meta, Karthus usually loses when facing off against Mordekaiser, with a 46.2% win rate. Thus, Karthus makes a poor counter to Mordekaiser.
While Karthus does have a lower winrate compared to Mordekaiser, when facing one another, Karthus also has a much greater level of difficulty that makes him a more challenging character to learn. You should be very concerned when picking Karthus into Mordekaiseras his relative depth means you may not be able to reach his full potential without a lot of practice beforehand.
Additionally, Karthus also has some amount of CC and other utility, a similar amount to Mordekaiser. This often makes her just as valuable during teamfights, 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 Mordekaiser matchups, Mordekaiser is the better champion with a much lower win rate, more champion depth, and a similar amount of utility to help out your teammates during teamfights.
Karthus is a bad counter for Mordekaiser. Make sure you focus your tactics on maximizing your gold and cs and taking out objectives. If you do that, you should do very well as Karthus against Mordekaiser.
To truly master Karthus in order to counter Mordekaiser during both the early game and mid / late game phases of League of Legends, you should keep reading to learn a few extra lessons on this matchup. If you pay attention to the build and suggestions presented here, you will increase your win rate significantly and be closer to League of Legends pro players.
Karthus typically accumulates less CS relative to Mordekaiser. Champions who typically don't acquire much CS often don't require much CS to be effective, such as supports. They are able to scale properly off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually require many items to be effective. In either case, try to do better than the values reported here to do well.
The most important items to focus on in your Karthus versus Mordekaiser build consist of Rabadon's Deathcap, Malignance, and Stormsurge. When Karthus combined at least these three pieces in his build, he did a lot better when fighting Mordekaiser than with most other typical builds. In fact, Karthus boasted an average win rate of 46.2% when countering Mordekaiser with these items in his kit.
To have the best likelihood of coming out on top against Mordekaiser 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 players picked for Karthus vs Mordekaiser face-offs, this mixture of runes resulted in the highest win rate. In fact, these runes averaged a 46.2% win rate overall.
If you need to get Karthus versus Mordekaiser tips and counter builds for a a particular player tier, please select one from the selection menu provided above. By default, the stats and guides displayed are computed using every game completed with both champions.