Karthus is ranked Tier and has a 10.00% win rate in LoL Arena Patch 25.09. We've analyzed 14 Karthus games to compile our statistical Karthus Arena Build Guide. For items, our build recommends: Malignance, Zhonya's Hourglass, Seraph's Embrace, Talisman Of Ascension, Perplexity, and Wooglet's Witchcap. Karthus's best augments include Quest: Wooglet's Witchcap (Prismatic), Phenomenal Evil (Gold), and Juice Box (Silver). Karthus's Best Arena matchups include Soraka, Jinx, and Swain. Karthus's Best Arena counters are Morgana and Yone.
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Best Prismatic Augments for Karthus
Quest: Wooglet's Witchcap
Tier: S

Infernal Conduit
Tier: S

Mad Scientist
Tier: A

Trueshot Prodigy
Tier: A

Best Gold Augments for Karthus
Phenomenal Evil
Tier: S+

Magic Missile
Tier: S

Extendo-Arm
Tier: S

Big Brain
Tier: A

Best Silver Augments for Karthus
Juice Box
Tier: S

Overflow
Tier: S

Witchful Thinking
Tier: A

Ice Cold
Tier: A

Karthus Skill Order
![]() | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
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![]() | Q | Q | Q | Q | Q | |||||||||||||
![]() | W | W | W | W | W | |||||||||||||
![]() | E | E | E | E | E | |||||||||||||
![]() | R | R | R |
Karthus Items by Round
Buy %
1

50%
3

7%
4

43%
5

21%
8

29%
14

7%
23

14%
Karthus Boots
Buy %

79%

14%
Karthus Situational Items
Buy %

29%

50%

79%

14%

7%

14%
Karthus Juices
Buy %

10%

1%

1%
Karthus Silver Augment Tier List









Karthus Gold Augment Tier List













Karthus Prismatic Augment Tier List








