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CRIMSON COBALT augment icon

GoldGold augment

CRIMSON COBALT

Enemy champions damaged by selected ability are marked for 4 seconds. Attacking a marked enemy consumes the mark to deal (100–250 (by level) +70% Bonus Attack Damage+35% Ability Power) magic damage and reduce the cooldown of selected ability by 65%.
Tier
C
Rank
#189
Rarity
Gold
Offered in
All picks
Patch
26.21

How CRIMSON COBALT plays

CRIMSON COBALT is C tier over all champions on patch 26.21: #189 of 226 augments and #71 of the 90 gold cards. That is the average over every champion; on the right one it is worth more, on the wrong one much less.

It gives ability power, attack damage and ability haste, so it pays off on champions that already use those. On a champion that doesn't, it is a wasted pick, whatever its tier.

It does best on Trundle, Olaf and Skarner. 7 of its 15 best champions are fighters.

Its tier holds in every pick it can show up in (C tier), so there is no bad moment to take it.

The card it pairs with best is Ethereal Weapon: if you already have one of the two, the other jumps up your list.

CRIMSON COBALT tier by pick

ARAMKit ranks every card for each of the four picks of a game separately. The rank is its place among the cards offered in that pick.
PickTierRank in that pick
First pickTier C#186
Second pickTier C#190
Third pickTier C#157
Fourth pickTier C#159

Best champions for CRIMSON COBALT

The champions CRIMSON COBALT does best on, best first, with its tier on each and the champion's own Mayhem tier. Tiers only: no win rates for augments, as Riot's policy asks.
#ChampionRoleCRIMSON COBALT on itChampion tier
1Trundle iconTrundleFighterTier STier A
2Olaf iconOlafFighterTier STier B
3Skarner iconSkarnerTankTier STier C
4Senna iconSennaSupportTier STier C
5Renekton iconRenektonFighterTier STier C
6Elise iconEliseAssassinTier STier B
7Azir iconAzirMageTier STier B
8Mordekaiser iconMordekaiserFighterTier STier C
9Sylas iconSylasMageTier STier B
10Ornn iconOrnnTankTier STier C
11Jax iconJaxFighterTier STier S
12Renata Glasc iconRenata GlascSupportTier ATier B
13Wukong iconWukongFighterTier ATier A
14Volibear iconVolibearFighterTier ATier A
15Talon iconTalonAssassinTier ATier B
16Jarvan IV iconJarvan IVFighterTier ATier C
17Amumu iconAmumuTankTier ATier B
18Pantheon iconPantheonFighterTier ATier B
19Ambessa iconAmbessaFighterTier ATier A
20Smolder iconSmolderMarksmanTier ATier B

Also good on Zed, Braum, Viego, Bel'Veth, Quinn, Poppy, Shyvana, Nocturne, Ezreal, Jhin, Ekko, Xin Zhao, Diana, Tryndamere, Darius, Malphite, Tristana, Illaoi, Gnar, Neeko, Naafiri, Nunu & Willump, Yone, Sivir, Annie, Mel, Galio, Kai'Sa, Swain, Nami, Yorick, Miss Fortune, Tahm Kench, Dr. Mundo, Ahri, Sona, Orianna, Veigar, Xayah, Zoe, Varus, Nasus, Brand, Vex, Aurora, Nidalee, Graves, Twisted Fate, Jinx, Ryze, Vladimir, Lux, Sion, Seraphine, Lucian, Gragas, Lulu, Kalista, Karma, Milio, Caitlyn, Soraka, Janna, Corki and Zeri.

Cards that pair with CRIMSON COBALT

The cards that do best next to it in the same game, best first.
  1. 1Ethereal WeaponTier A
  2. 2Echo CastTier A
  3. 3Upgrade Sundered SkyTier D
  4. 4OverflowTier A
  5. 5Upgrade Ravenous HydraTier B
  6. 6Mind to MatterTier A
  7. 7Dive BomberTier B
  8. 8BEES!!!Tier A

Items to buy with CRIMSON COBALT

The items that do best in games with this card, best first, over all champions. Check your champion's build page for its own items.
  1. Hextech Gunblade1. Hextech Gunblade
  2. Imperial Mandate2. Imperial Mandate
  3. Black Cleaver3. Black Cleaver
  4. Sundered Sky4. Sundered Sky
  5. Eclipse5. Eclipse
  6. Hextech Rocketbelt6. Hextech Rocketbelt

Questions and answers

What does CRIMSON COBALT do in ARAM Mayhem?

Enemy champions damaged by selected ability are marked for 4 seconds. Attacking a marked enemy consumes the mark to deal (100–250 (by level) +70% Bonus Attack Damage+35% Ability Power) magic damage and reduce the cooldown of selected ability by 65%.

Is CRIMSON COBALT good in ARAM Mayhem?

On patch 26.21 CRIMSON COBALT is C tier over all champions (#189). It is at its best on Trundle, Olaf and Skarner.

Which champions is CRIMSON COBALT best on?

Best first: Trundle, Olaf, Skarner, Senna, Renekton, Elise, Azir and Mordekaiser. The full list with each champion's tier is on this page.

What pairs well with CRIMSON COBALT?

Ethereal Weapon, Echo Cast and Upgrade Sundered Sky, best first.

Pick your cards with the tiers next to you

LazyElo is a free Windows app that sits next to the League client. In ARAM Mayhem it shows the strongest champion on your bench, and in game you type the three cards you're offered to see their tier for your champion and what each one does.

Related

Source: ARAMKit, used with permission. Patch 26.21, 23,177,263 ARAM Mayhem games, data of October 28, 2026. Riot keeps Mayhem games out of its public match API, so these aggregates come from ARAMKit. Card tiers are shown without win rates, as Riot's developer policy asks.