Is Karthus good in Patch 26.21?

Karthus is B tier Jungle in Patch 26.21 with a 50.5% win rate, 1.4% pick rate, and 1.1% ban rate over merged Emerald+ data from u.gg and op.gg. MOBA Trainer rescored Karthus Jungle after Patch 26.21 using win rate, pick rate, and ban rate within the Jungle role.

What is the best build for Karthus Jungle?

The best Karthus Jungle build in Patch 26.21 uses Blackfire Torch, Shadowflame, Rabadon's Deathcap with the Dark Harvest keystone from op.gg build data merged into MOBA Trainer. Karthus Jungle is B tier with 50.5% win rate this patch.

Who counters Karthus?

No recorded opponent wins the matchup against Karthus in Patch 26.21 over merged Emerald+ data. See the counters section for full matchup stats.

JUNGLE · EMERALD+ · RANKED SOLO

How to Play KarthusJungle Build, Emerald+Patch 26.21

The recommended Karthus Jungle build for LoL Patch 26.21, from rune set to skill order to item path, based on MOBA Trainer's merged Emerald+ data.

Last updated Oct 21, 2026

Patch 26.21 · Emerald+ · Ranked Solo

TierTier up since last patchB#36of 58 Jungle champions

Win rate50.5%vs 51.0% role avg

Pick rate1.4%43rd most picked Jungle

Ban rate1.1%

Karthus puzzle

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Karthus Jungle Build (Patch 26.21)

Highest win rate build path (1.4% pick rate, 53.5% win rate). Stats aggregated from Emerald+ ranked.

Runes

53.5% WR

DominationPRIMARY

Dark HarvestKEYSTONE

Cheap Shot

Grisly Mementos

Ultimate Hunter

SorcerySECONDARY

Axiom Arcanist

Gathering Storm

SHARDS

Summoner spells

Exhaust

Smite

Skill order

WMax Q first

13579

41415

28101213

611

Item build

1.4% pick

Starting

Scorchclaw Pup + Health Potion

Core build

Blackfire Torch

Shadowflame

Rabadon's Deathcap

Boots

Sorcerer's Shoes

Situational

Blackfire Torch

Shadowflame

Rabadon's Deathcap

Liandry's Torment

Zhonya's Hourglass

Void Staff

Karthus Jungle meta analysis (Patch 26.21)

Karthus holds a 50.5% win rate in the Jungle role on Patch 26.21, 0.5 points below the Jungle role average of 51.0%. That is the 36th highest win rate of 58 Jungle champions tracked at Emerald+ this patch. With a 1.4% pick rate (43rd most played in the role) and a 1.1% ban rate, Karthus rarely gets banned, so the pick is almost always available in champion select.

Patch 26.21 was good to Karthus Jungle: the tier rating climbed from C to B after the latest data merge, which usually means either direct buffs, favorable item changes, or nerfs to common lane opponents. At B tier, Karthus works best as a counter pick or comfort pick rather than a blind pick.

Other Jungle champions at a similar power level in Patch 26.21:

Frequently asked questions

Is Karthus good in Patch 26.21?: Karthus is B tier Jungle in Patch 26.21 with a 50.5% win rate, 1.4% pick rate, and 1.1% ban rate over merged Emerald+ data from u.gg and op.gg. MOBA Trainer rescored Karthus Jungle after Patch 26.21 using win rate, pick rate, and ban rate within the Jungle role.
What is the best build for Karthus Jungle?: The best Karthus Jungle build in Patch 26.21 uses Blackfire Torch, Shadowflame, Rabadon's Deathcap with the Dark Harvest keystone from op.gg build data merged into MOBA Trainer. Karthus Jungle is B tier with 50.5% win rate this patch.
Who counters Karthus?: No recorded opponent wins the matchup against Karthus in Patch 26.21 over merged Emerald+ data. See the counters section for full matchup stats.