This will vary because unlike other stat sites we include 100% of a brackets champions played and never include champions that don't belong in the bracket.
Platinum+ Champions Analysed: 70,918,941
We include 100% of the champions played of every selected tier bracket in our analysis, we never include champions from outside the tier quoted tier.
Karthus Counters
Karthus support vs support Counters
Karthus support on Patch 14.1 is the strongest counter to support champions of Rakan, Leona & Pyke. While Karthus support is countered most by support champions of Lulu, Xerath & Morgana. Below is a detailed breakdown of Karthus support counters against support champions with a minimum of 100 games.
Lulu
the Fae Sorceress
Karthus wins against Lulu 29.37% of the time which is 22.23% lower against Lulu than the average opponent.
After normalising both champions win rates Karthus wins against Lulu 16.45% less often than would be expected.
The average opponent winrate against Luluis 51.60%.
Xerath
the Magus Ascendant
Karthus wins against Xerath 37.25% of the time which is 11.58% lower against Xerath than the average opponent.
After normalising both champions win rates Karthus wins against Xerath 5.84% less often than would be expected.
The average opponent winrate against Xerathis 48.83%.
Milio
The Gentle Flame
Karthus wins against Milio 40.00% of the time which is 8.91% lower against Milio than the average opponent.
After normalising both champions win rates Karthus wins against Milio 3.17% less often than would be expected.
The average opponent winrate against Miliois 48.91%.
Morgana
the Fallen
Karthus wins against Morgana 40.00% of the time which is 7.66% lower against Morgana than the average opponent.
After normalising both champions win rates Karthus wins against Morgana 1.96% less often than would be expected.
The average opponent winrate against Morganais 47.66%.
Soraka
the Starchild
Karthus wins against Soraka 40.74% of the time which is 8.11% lower against Soraka than the average opponent.
After normalising both champions win rates Karthus wins against Soraka 2.37% less often than would be expected.
The average opponent winrate against Sorakais 48.85%.
Janna
the Storm's Fury
Karthus wins against Janna 41.35% of the time which is 5.88% lower against Janna than the average opponent.
After normalising both champions win rates Karthus wins against Janna 0.19% less often than would be expected.
The average opponent winrate against Jannais 47.23%.
Bard
the Wandering Caretaker
Karthus wins against Bard 42.06% of the time which is 4.44% lower against Bard than the average opponent.
After normalising both champions win rates Karthus wins against Bard 1.23% more often than would be expected.
The average opponent winrate against Bardis 46.50%.
Nami
the Tidecaller
Karthus wins against Nami 42.07% of the time which is 7.74% lower against Nami than the average opponent.
After normalising both champions win rates Karthus wins against Nami 1.98% less often than would be expected.
The average opponent winrate against Namiis 49.81%.
Zyra
Rise of the Thorns
Karthus wins against Zyra 42.31% of the time which is 4.54% lower against Zyra than the average opponent.
After normalising both champions win rates Karthus wins against Zyra 1.14% more often than would be expected.
The average opponent winrate against Zyrais 46.85%.
Senna
the Redeemer
Karthus wins against Senna 42.34% of the time which is 6.16% lower against Senna than the average opponent.
After normalising both champions win rates Karthus wins against Senna 0.43% less often than would be expected.
The average opponent winrate against Sennais 48.50%.
Lux
the Lady of Luminosity
Karthus wins against Lux 42.64% of the time which is 7.59% lower against Lux than the average opponent.
After normalising both champions win rates Karthus wins against Lux 1.83% less often than would be expected.
The average opponent winrate against Luxis 50.23%.
Nautilus
the Titan of the Depths
Karthus wins against Nautilus 43.18% of the time which is 6.75% lower against Nautilus than the average opponent.
After normalising both champions win rates Karthus wins against Nautilus 0.99% less often than would be expected.
The average opponent winrate against Nautilusis 49.93%.
Blitzcrank
the Great Steam Golem
Karthus wins against Blitzcrank 43.65% of the time which is 2.79% lower against Blitzcrank than the average opponent.
After normalising both champions win rates Karthus wins against Blitzcrank 2.88% more often than would be expected.
The average opponent winrate against Blitzcrankis 46.44%.
Thresh
the Chain Warden
Karthus wins against Thresh 45.83% of the time which is 3.78% lower against Thresh than the average opponent.
After normalising both champions win rates Karthus wins against Thresh 1.97% more often than would be expected.
The average opponent winrate against Threshis 49.61%.
Karma
the Enlightened One
Karthus wins against Karma 46.36% of the time which is 6.18% lower against Karma than the average opponent.
After normalising both champions win rates Karthus wins against Karma 0.39% less often than would be expected.
The average opponent winrate against Karmais 52.54%.
Pyke
the Bloodharbor Ripper
Karthus wins against Pyke 48.18% of the time which is 1.67% lower against Pyke than the average opponent.
After normalising both champions win rates Karthus wins against Pyke 4.09% more often than would be expected.
The average opponent winrate against Pykeis 49.85%.
Leona
the Radiant Dawn
Karthus wins against Leona 50.00% of the time which is 2.85% higher against Leona than the average opponent.
After normalising both champions win rates Karthus wins against Leona 8.54% more often than would be expected.
The average opponent winrate against Leonais 47.15%.
Rakan
The Charmer
Karthus wins against Rakan 50.93% of the time which is 3.67% higher against Rakan than the average opponent.
After normalising both champions win rates Karthus wins against Rakan 9.36% more often than would be expected.
The average opponent winrate against Rakanis 47.26%.