Karthus vs Mordekaiser Counter Build

How to Beat Mordekaiser as Karthus


We at MOBA Champion evaluate millions of recently ranked League of Legends rounds each and every week. Within our dataset, Karthus engaged Mordekaiser in 14,200 rounds. Having so many matchups for Karthus vs Mordekaiser gives us confidence in our capability to prepare useful data and a solid build to wreck your opponent.

This champion pairing is somewhat common. Karthus is forced to battle against Mordekaiser in 39.7% of his matches. Karthus does a average job of beating Mordekaiser. Typically, he wins a acceptable 50.0% of games the champions battle each other in. In Karthus against Mordekaiser rounds, Karthus’s side is 3.0% less expected to earn first blood. This implies that he most likely won't be able to get first blood against Mordekaiser.

Matchups Analyzed


Team First Blood


Win Rate


Best Karthus Items to Counter Mordekaiser

The best items to focus on in your Karthus versus Mordekaiser build include Rabadon's Deathcap, Demonic Embrace, and Liandry's Anguish. When Karthus combined at least these three items in his build, he performed significantly better versus Mordekaiser than with most other commonly used item sets.

Rabadon's Deathcap Item Demonic Embrace Item Liandry's Anguish Item

Best Karthus Runes to Counter Mordekaiser

To have the best probability of annihilating Mordekaiser as Karthus, you should use the Dark Harvest, Taste of Blood, Eyeball Collection, Ultimate Hunter, Presence of Mind, and Last Stand runes. Out of all the rune sets players chose for Karthus vs Mordekaiser clashes, this order of runes yielded the greatest win rate. We have also displayed the best Mordekaiser runes to fend off Karthus to help you grasp how he will probably be setup to try to beat your champion.

Best Karthus Runes

Dark Harvest Rune Dark Harvest
Taste of Blood Rune Taste of Blood
Eyeball Collection Rune Eyeball Collection
Ultimate Hunter Rune Ultimate Hunter
Presence of Mind Rune Presence of Mind
Last Stand Rune Last Stand

Best Mordekaiser Runes

Conqueror Rune Conqueror
Triumph Rune Triumph
Legend: Tenacity Rune Legend: Tenacity
Last Stand Rune Last Stand
Second Wind Rune Second Wind
Revitalize Rune Revitalize


The following tables feature several strategic Karthus versus Mordekaiser matchup stats that can help us interpret the differences and similarities between the pair. Karthus’s KDA ratio ([kills + assists] / deaths) of 2.2 is better than Mordekaiser’s KDA ratio of 1.8, indicating that Karthus may be more central to his team's team fighting effectiveness than Mordekaiser. This observation is largely a result of the differences in assists.

Battle Stats


Karthus Stats
7.3 6.7
Mordekaiser Stats


Karthus Stats
7.3 6.3
Mordekaiser Stats


Karthus Stats
9.1 4.7
Mordekaiser Stats

Largest Killing Spree

Karthus Stats
2.7 3
Mordekaiser Stats

Damage Dealt

Karthus Stats
26513 18957
Mordekaiser Stats

Damage Taken

Karthus Stats
24582 28957
Mordekaiser Stats

Objective Stats

Towers Destroyed

Karthus Stats
5.1 5.3
Mordekaiser Stats

Inhibitors Destroyed

Karthus Stats
0.9 0.9
Mordekaiser Stats

Dragons Killed

Karthus Stats
1.8 2.1
Mordekaiser Stats

Barons Killed

Karthus Stats
0.4 0.4
Mordekaiser Stats

Gold Earned

Karthus Stats
11525 10875
Mordekaiser Stats

Minions Killed

Karthus Stats
77 137
Mordekaiser Stats

Karthus normally has a similar longest kill spree as his opponent does. Commonly, Karthus receives less damage than Mordekaiser. This commonly reflects different amounts of tankyness, but it can also indicate that the champion with increased health has less agility and thus is unable to flee from further damage when poked or engaged.

Karthus often racks up many fewer minion kills than Mordekaiser. Champions that do not amass a lot of minion kills usually don't have to have much CS to be effective. They are capable of scaling adequately off their skills and stats alone. Yet, champions with large numbers of minion kills, such as ADCs, typically need a lot of gold to be useful. In either situation, try to best the averages displayed here to do well.

By default, Karthus vs Mordekaiser tips, stats, and build suggestions are presented for all skill levels combined. To filter the stats and builds to a distinct division, you can use the selection menu at the top of the page.

How We Analyze Our Matchups

For this counter guide, we analyzed 14200 Karthus vs Mordekaiser matchups from recent LoL games. We use rigorous data cleaning and processing methods to ensure that our counter stats are of the highest quality. You can rest assured that the recommended build to counter Mordekaiser as Karthus comes from real data and is not the fabrication of some random LoL player, as some other sites provide. You can use the filters at the top of the page to view the most relevant stats and items to your rank.