Karthus is ranked Tier and has a 13.04% win rate in LoL Arena Patch 25.09. We've analyzed 40 Karthus games to compile our statistical Karthus Arena Build Guide. For items, our build recommends: Sorcerer's Shoes, Rabadon's Deathcap, Shadowflame, Void Staff, Morellonomicon, and Detonation Orb. Karthus's best augments include Eureka (Prismatic), Thread the Needle (Gold), and Juice Box (Silver). Karthus's Best Arena matchups include Rek'Sai, Tryndamere, and Lux. Karthus's Best Arena counters are Ezreal, Lee Sin, and Braum.
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Best Prismatic Augments for Karthus
Eureka
Tier: S+

Slow Cooker
Tier: S

Doomsayer
Tier: S

Omni Soul
Tier: S

Best Gold Augments for Karthus
Thread the Needle
Tier: S+

We'll Be Right Back
Tier: S+

Vanish
Tier: S

Apex Inventor
Tier: S

Best Silver Augments for Karthus
Juice Box
Tier: S

Transmute: Gold
Tier: S

Juice Press
Tier: S

Firefox
Tier: S

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

78%
2

83%
3

28%
4

98%
8

38%
11

40%
14

30%
Karthus Boots
Buy %

83%

8%

3%
Karthus Situational Items
Buy %

20%

30%

35%

8%

8%

8%
Karthus Juices
Buy %

5%

1%

1%
Karthus Silver Augment Tier List



















Karthus Gold Augment Tier List
























Karthus Prismatic Augment Tier List

















