Karthus vs Fizz JUNGLE Matchup Guide | LaneStomp

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Karthus

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Jungle

Fizz

Karthus vs Fizz

Updated Jun 4, 2026

Overview

Prioritize full clears early to leverage Karthus's superior clear speed and avoid early river fights where Fizz's mobility and burst can punish you.
Focus on scaling through efficient jungle tempo and avoid early duels or forced fights before level 6.
Use vision to protect your pathing and prevent Fizz from invading or collapsing on scuttle crab fights.

Jungle Plan

Use fast full clears to maintain tempo and reach key item spikes before contesting objectives.
Contest river control and Scuttle only when allied lanes have priority to avoid isolated fights against Fizz's high mobility and burst.
Counter-gank proactively around level 6 when (R) is available to punish Fizz's all-in attempts and secure objectives like dragon or Rift Herald.

Danger windows

Vulnerable during early clears with low health and no vision; avoid extended river paths where Fizz can invade or collapse.
Isolated river fights before level 6 are high risk due to Fizz's mobility and burst potential.
Objective setups without vision control can lead to forced smite fights where Fizz's burst and mobility can outplay you.

Early game

Start with a full clear path to reach level 6 quickly and avoid early river skirmishes where Fizz's high mobility and burst pose a threat.
Only contest the first Scuttle if nearby lanes have priority and can assist, otherwise prioritize safe farming and vision control.
Track Fizz's early jungle movements and avoid low-health river entries to reduce risk of being caught out.

Power spikes

Level 6 unlocks (R), allowing Karthus to influence fights globally and finish low-health enemies; use this to pressure objectives and counter-gank.
First AP item increases clear speed and damage, enabling faster tempo and stronger objective control; leverage this to outpace Fizz.
Respect Fizz's level 3 power spike when he gains his engage and escape combo, avoiding early fights before you have sufficient health and vision.

Win conditions

Convert fast clear tempo and first AP item spike into early objective control and vision dominance around dragon and Rift Herald.
Use (R) after successful skirmishes or when enemies are low to secure kills and snowball map pressure.
Deny Fizz's invade attempts by tracking his pathing and counter-jungling when he overextends or commits to ganks.