Tier: Off MetaWin50.20%Role3.49%Pick0.07%Ban1.25%Games: 175KDA: 2.00Score: 55.31
Karthus Support is ranked Off Meta Tier and has a 50.20% win rate in LoL Patch 25.10. We've analyzed 175 Karthus Support games to compile our statistical Karthus Build Guide. For items, our build recommends: Sorcerer's Shoes, Blackfire Torch, Zaz'Zak's Realmspike, Malignance, Liandry's Torment, and Shadowflame. For runes, the strongest choice is Domination (Primary) with Dark Harvest (Keystone), and Sorcery (Secondary). The optimal Summoner Spells for this build are Flash and Exhaust. Starting items should include Sapphire Crystal and Health Potion. Karthus's Best Support matchups include Nautilus, Poppy, and Senna. Karthus's Best Support counters are Leona, Shaco, and Brand.
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Karthus Summoner Spells


Win %
Pick %
51%
89%
46%
57%

58%
29%

43%
13%

67%
5%

30%
6%
Karthus Starting Items
Win %
Buy %


2
0%
1%
Karthus Runes
Win %
Pick %
44%
45%
65%
24%
38%
12%
100%
2%
Karthus Items

54%

49%

51%

46%

52%

55%

50%

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






















Karthus Trinkets
Win %
Buy %

50%
83%

54%
63%

33%
2%
Karthus Boots
Win %
Buy %

54%
70%

31%
7%

100%
1%

33%
2%
Karthus Support Items
Win %
Buy %

51%
83%

100%
2%

100%
1%

50%
1%

100%
1%