Best Karthus ADC Counters

High Elo data lists Ezreal ADC, Yunara ADC, and Jinx ADC as the strongest counters for Karthus ADC. Karthus ADC is listed as favorable into Kai'Sa ADC and Jhin ADC. The detailed info below lists each matchup with observed win rate, expected win rate delta, sample size, rank scope, and patch window.

Updated 2026-11-15. Data is current for LoL patch 26.22 (all regions, low elo and high elo).

Top 3 High Elo Karthus ADC same-role counters

  1. Ezreal ADC - High Elo data: Karthus ADC vs Ezreal ADC, 55.3% observed win rate, -0.8 percentage points vs expected, 1,208 games, 3-patch window 26.20-26.22.
  2. Yunara ADC - High Elo data: Karthus ADC vs Yunara ADC, 53.9% observed win rate, -0.5 percentage points vs expected, 1,050 games, 3-patch window 26.20-26.22.
  3. Jinx ADC - High Elo data: Karthus ADC vs Jinx ADC, 52.0% observed win rate, -0.5 percentage points vs expected, 1,033 games, 3-patch window 26.20-26.22.

Top 2 High Elo champions Karthus ADC is good against

  1. Kai'Sa ADC - High Elo data: Karthus ADC vs Kai'Sa ADC, 56.5% observed win rate, +1.0 percentage points vs expected, 1,794 games, 3-patch window 26.20-26.22.
  2. Jhin ADC - High Elo data: Karthus ADC vs Jhin ADC, 56.1% observed win rate, +0.7 percentage points vs expected, 1,719 games, 3-patch window 26.20-26.22.

Top 5 High Elo Karthus ADC all-role counters

  1. Ezreal ADC - High Elo data: Karthus ADC vs Ezreal ADC, 55.3% observed win rate, -0.8 percentage points vs expected, 1,208 games, 3-patch window 26.20-26.22.
  2. Yunara ADC - High Elo data: Karthus ADC vs Yunara ADC, 53.9% observed win rate, -0.5 percentage points vs expected, 1,050 games, 3-patch window 26.20-26.22.
  3. Jinx ADC - High Elo data: Karthus ADC vs Jinx ADC, 52.0% observed win rate, -0.5 percentage points vs expected, 1,033 games, 3-patch window 26.20-26.22.
  4. Lulu Support - High Elo data: Karthus ADC vs Lulu Support, 54.5% observed win rate, -0.4 percentage points vs expected, 1,310 games, 3-patch window 26.20-26.22.
  5. Lee Sin Jungle - High Elo data: Karthus ADC vs Lee Sin Jungle, 55.7% observed win rate, -0.0 percentage points vs expected, 1,044 games, 3-patch window 26.20-26.22.

Top 4 High Elo all-role champions Karthus ADC is good against

  1. Kai'Sa ADC - High Elo data: Karthus ADC vs Kai'Sa ADC, 56.5% observed win rate, +1.0 percentage points vs expected, 1,794 games, 3-patch window 26.20-26.22.
  2. Nautilus Support - High Elo data: Karthus ADC vs Nautilus Support, 56.5% observed win rate, +0.9 percentage points vs expected, 1,040 games, 3-patch window 26.20-26.22.
  3. Jhin ADC - High Elo data: Karthus ADC vs Jhin ADC, 56.1% observed win rate, +0.7 percentage points vs expected, 1,719 games, 3-patch window 26.20-26.22.
  4. Thresh Support - High Elo data: Karthus ADC vs Thresh Support, 53.4% observed win rate, +0.3 percentage points vs expected, 1,278 games, 3-patch window 26.20-26.22.

How these matchup statistics are calculated

Counter and synergy statistics use Ranked Solo/Duo games, exclude matches shorter than 600 seconds, and group results by patch window, region, rank scope, and champion role.

Pairwise pages use a rolling three-patch window and compare observed win rate with a log-odds expected win rate based on each champion's role-adjusted baseline; listed pairs require at least 1,000 games.

Read the full methodology for the model and guidance on interpreting these results.