Arena Companion — Builds, Augments and Matchups

Patch 26.18Arena build

Karthus

mage

Arena progression, alternatives, augments and partner matchups for Karthus.

Arena tier

Top 3

52.4%

Avg. place

3.41

Pick rate

12.4%

Ban rate

5.8%

KDA

2.44

Games

78,711

Arena progression

Core by round

Observed sequence · pick rate and game volume included

Round 1

Opening item

Sorcerer's Shoes

70% pick · 55K games

Round 2

Prismatic

Detonation Orb

29% pick · 23K games

Round 4

Core item

Malignance

52% pick · 41K games

Round 6

Core item

Rabadon's Deathcap

73% pick · 58K games

Round 9

Core item

Void Staff

19% pick · 5.9K games

Round 11

Late game

Shadowflame

14% pick · 4.6K games

Augment picks

Source pick share by rarity · separate from the community sample.

Curated source · patch 26.18

Silver

ADAPt
15531 games
20.0%
Witchful Thinking
12067 games
15.0%
Augmented Power
6660 games
8.0%
Executioner
3173 games
4.0%

Gold

It's Killing Time
21055 games
27.0%
Phenomenal Evil
15030 games
19.0%
Magic Missile
12288 games
16.0%
From Beginning to End
8944 games
11.4%

Prismatic

Jeweled Gauntlet
23777 games
30.0%
Spellwake
11393 games
14.0%
Glass Cannon
9143 games
12.0%
Eureka
9221 games
11.7%

Best Prismatic items

Full Arena choice set for Karthus, ordered by observed popularity.

S+

Detonation Orb

29% pick · 22740 games

Night Harvester

21% pick · 16767 games

Pyromancer's Cloak

19% pick · 14597 games

Runecarver

15% pick · 11830 games

Decapitator

10% pick

Demonic Embrace

9.0% pick

Everfrost

9.0% pick

Innervating Locket

8.0% pick

Dragonheart

7.0% pick

Sword of the Divine

6.0% pick

Diamond-Tipped Spear

5.0% pick

Regicide

0.0% pick

Force Of Entropy

0.0% pick

Skill priority

Recommended ability max order for this Arena snapshot.

Boots

All stable Arena boot choices in the source sample.

Sorcerer's Shoes

70% pick · 55K games

Ionian Boots of Lucidity

10% pick · 8.1K games

Gluttonous Greaves

1.0% pick · 526 games

Ghostcrawlers

0.0% pick · 354 games

Berserker's Greaves

0.0% pick · 205 games

Elixirs

Late-game consumables and their observed pick share.

Juice of Power

77% pick · 33K games

Cappa Juice

10% pick · 4.4K games

Juice of Vitality

7.0% pick · 2.8K games

Juice of Haste

6.0% pick · 2.4K games

Round alternatives

Other item rolls observed at the main Arena purchase rounds.

Round 4 options

Malignance

52% pick · 41K games

Round 6 options

Rabadon's Deathcap

73% pick · 58K games

Round 9 options

Void Staff

8.0% pick · 5.9K games

Shadowflame

6.0% pick · 4.6K games

Wooglet's Witchcap

4.0% pick · 3.1K games

Liandry's Anguish

4.0% pick · 3K games

Best partner synergies

Arena partners that overperform beside Karthus in the source sample.

Amumu

61% Top 3 · +9.0

1.2K games

Galio

60% Top 3 · +7.8

1.2K games

Singed

59% Top 3 · +6.3

1.4K games

Vladimir

58% Top 3 · +5.8

1.2K games

Xin Zhao

57% Top 3 · +4.7

1.3K games

Sion

57% Top 3 · +4.6

1.5K games

Cho'Gath

57% Top 3 · +4.1

1.4K games

Swain

55% Top 3 · +2.8

1.4K games

Dr. Mundo

55% Top 3 · +2.5

1.3K games

Tristana

55% Top 3 · +2.4

1.7K games

Zed

54% Top 3 · +1.6

1.5K games

Kai'Sa

54% Top 3 · +1.3

1.4K games

Difficult matchups

Common opponents that pressure Karthus's Arena results.

Tristana

54% Top 3

11.7K games

Kai'Sa

53% Top 3

10.8K games

Ashe

53% Top 3

10.5K games

Twisted Fate

53% Top 3

11.5K games

Jhin

53% Top 3

11.9K games

Ornn

52% Top 3

11.8K games

Cho'Gath

51% Top 3

10.7K games

Sett

51% Top 3

12.2K games

Snapshot context

Arena-only public observations, resolved against the current patch catalogue.

Top augment trio

Jeweled Gauntlet · It's Killing Time · ADAPt

Prismatic depth

13 tracked choices

Source score

59.29 · 78,711 games

Patch 26.18Arena build

Karthus

mage

Arena progression, alternatives, augments and partner matchups for Karthus.

Arena tier

Top 3

52.4%

Avg. place

3.41

Pick rate

12.4%

Ban rate

5.8%

KDA

2.44

Games

78,711

Arena progression

Core by round

Observed sequence · pick rate and game volume included

Round 1

Opening item

Sorcerer's Shoes

70% pick · 55K games

Round 2

Prismatic

Detonation Orb

29% pick · 23K games

Round 4

Core item

Malignance

52% pick · 41K games

Round 6

Core item

Rabadon's Deathcap

73% pick · 58K games

Round 9

Core item

Void Staff

19% pick · 5.9K games

Round 11

Late game

Shadowflame

14% pick · 4.6K games

Augment picks

Source pick share by rarity · separate from the community sample.

Curated source · patch 26.18

Silver

ADAPt
15531 games
20.0%
Witchful Thinking
12067 games
15.0%
Augmented Power
6660 games
8.0%
Executioner
3173 games
4.0%

Gold

It's Killing Time
21055 games
27.0%
Phenomenal Evil
15030 games
19.0%
Magic Missile
12288 games
16.0%
From Beginning to End
8944 games
11.4%

Prismatic

Jeweled Gauntlet
23777 games
30.0%
Spellwake
11393 games
14.0%
Glass Cannon
9143 games
12.0%
Eureka
9221 games
11.7%

Best Prismatic items

Full Arena choice set for Karthus, ordered by observed popularity.

S+

Detonation Orb

29% pick · 22740 games

Night Harvester

21% pick · 16767 games

Pyromancer's Cloak

19% pick · 14597 games

Runecarver

15% pick · 11830 games

Decapitator

10% pick

Demonic Embrace

9.0% pick

Everfrost

9.0% pick

Innervating Locket

8.0% pick

Dragonheart

7.0% pick

Sword of the Divine

6.0% pick

Diamond-Tipped Spear

5.0% pick

Regicide

0.0% pick

Force Of Entropy

0.0% pick

Skill priority

Recommended ability max order for this Arena snapshot.

Boots

All stable Arena boot choices in the source sample.

Sorcerer's Shoes

70% pick · 55K games

Ionian Boots of Lucidity

10% pick · 8.1K games

Gluttonous Greaves

1.0% pick · 526 games

Ghostcrawlers

0.0% pick · 354 games

Berserker's Greaves

0.0% pick · 205 games

Elixirs

Late-game consumables and their observed pick share.

Juice of Power

77% pick · 33K games

Cappa Juice

10% pick · 4.4K games

Juice of Vitality

7.0% pick · 2.8K games

Juice of Haste

6.0% pick · 2.4K games

Round alternatives

Other item rolls observed at the main Arena purchase rounds.

Round 4 options

Malignance

52% pick · 41K games

Round 6 options

Rabadon's Deathcap

73% pick · 58K games

Round 9 options

Void Staff

8.0% pick · 5.9K games

Shadowflame

6.0% pick · 4.6K games

Wooglet's Witchcap

4.0% pick · 3.1K games

Liandry's Anguish

4.0% pick · 3K games

Best partner synergies

Arena partners that overperform beside Karthus in the source sample.

Amumu

61% Top 3 · +9.0

1.2K games

Galio

60% Top 3 · +7.8

1.2K games

Singed

59% Top 3 · +6.3

1.4K games

Vladimir

58% Top 3 · +5.8

1.2K games

Xin Zhao

57% Top 3 · +4.7

1.3K games

Sion

57% Top 3 · +4.6

1.5K games

Cho'Gath

57% Top 3 · +4.1

1.4K games

Swain

55% Top 3 · +2.8

1.4K games

Dr. Mundo

55% Top 3 · +2.5

1.3K games

Tristana

55% Top 3 · +2.4

1.7K games

Zed

54% Top 3 · +1.6

1.5K games

Kai'Sa

54% Top 3 · +1.3

1.4K games

Difficult matchups

Common opponents that pressure Karthus's Arena results.

Tristana

54% Top 3

11.7K games

Kai'Sa

53% Top 3

10.8K games

Ashe

53% Top 3

10.5K games

Twisted Fate

53% Top 3

11.5K games

Jhin

53% Top 3

11.9K games

Ornn

52% Top 3

11.8K games

Cho'Gath

51% Top 3

10.7K games

Sett

51% Top 3

12.2K games

Snapshot context

Arena-only public observations, resolved against the current patch catalogue.

Top augment trio

Jeweled Gauntlet · It's Killing Time · ADAPt

Prismatic depth

13 tracked choices

Source score

59.29 · 78,711 games