League of Legends
Valorant
Rematch
Teamfight Tactics
DeadlockNEW
World of Warcraft
Helldivers 2
2XKO SOON™
Download Now
Tier List
N
ARAM Mayhem
NEW
Champions
Multisearch
Leaderboards
Live Games
Items
N
Watch
NEW
News
Probuild Stats
Guest
Logged Out
B
Camille

CamilleArena Build
Patch 26.8

Camille's Passive: Adaptive Defenses
P
Camille's Q: Precision Protocol
Q
Camille's W: Tactical Sweep
W
Camille's E: Hookshot
E
Camille's R: The Hextech Ultimatum
R
Camille Arena Build with the best items, augments, and duos. U.GG analyzes millions of matches to give you the best Camille Arena guide. Patch 26.8
Camille Arena Build with the best items, augments, and duos. U.GG analyzes millions of matches to give you the best Camille Arena guide. Patch 26.8
Build
Arena
ARAM
Counters
Leaderboards
ProbuildStats
Pro Builds
More Stats
Filters
Arena
26.8
B
Tier
49.56%
Win Rate
87 / 172
Rank
6%
Pick Rate
2.1%
Ban Rate
1,132
Matches
Camille Synergies
Champion
Avg. Place
1st Rate
Top 4 Rate
Pick Rate
1
Sett
4.11
5.56%
55.56%
1.59%18
2
Shyvana
4.12
5.88%
58.82%
1.50%17
3
Shaco
5.47
6.67%
40.00%
1.33%15
4
Smolder
4.86
7.14%
35.71%
1.24%14
5
Twisted Fate
5.29
7.14%
28.57%
1.24%14
6
Renata Glasc
4.85
15.38%
53.85%
1.15%13
7
Vayne
4.69
0.00%
53.85%
1.15%13
8
Lux
4.08
15.38%
53.85%
1.15%13
9
Xin Zhao
3.75
25.00%
58.33%
1.06%12
10
Rengar
6.08
8.33%
16.67%
1.06%12
11
Fiddlesticks
3.64
0.00%
90.91%
0.97%11
12
Jhin
3.09
18.18%
81.82%
0.97%11
13
Lillia
3.36
27.27%
72.73%
0.97%11
14
Briar
3.73
9.09%
72.73%
0.97%11
15
Darius
4.91
0.00%
63.64%
0.97%11
16
Ekko
4.27
9.09%
63.64%
0.97%11
17
Blitzcrank
3.55
18.18%
63.64%
0.97%11
18
Amumu
4.82
9.09%
45.45%
0.97%11
19
Tristana
5.64
9.09%
36.36%
0.97%11
20
Pantheon
3.30
30.00%
70.00%
0.88%10
21
Katarina
3.50
10.00%
70.00%
0.88%10
22
Jax
4.30
10.00%
60.00%
0.88%10
23
Ezreal
4.10
0.00%
50.00%
0.88%10
24
Dr. Mundo
4.30
20.00%
50.00%
0.88%10
25
Singed
5.80
0.00%
30.00%
0.88%10
26
Mel
4.70
20.00%
30.00%
0.88%10
27
Aatrox
5.40
0.00%
20.00%
0.88%10
28
Ryze
3.44
33.33%
66.67%
0.80%9
29
Xayah
3.56
22.22%
66.67%
0.80%9
30
Shen
4.44
0.00%
66.67%
0.80%9
31
Mordekaiser
3.89
0.00%
55.56%
0.80%9
32
Caitlyn
4.00
22.22%
55.56%
0.80%9
33
Nautilus
5.22
0.00%
55.56%
0.80%9
34
Pyke
4.78
0.00%
55.56%
0.80%9
35
Gangplank
4.11
11.11%
55.56%
0.80%9
36
Morgana
4.89
11.11%
55.56%
0.80%9
37
Twitch
5.33
0.00%
44.44%
0.80%9
38
Trundle
5.33
11.11%
33.33%
0.80%9
39
Graves
5.33
11.11%
33.33%
0.80%9
40
Ashe
5.22
0.00%
33.33%
0.80%9
41
Maokai
5.22
11.11%
22.22%
0.80%9
42
Yorick
3.75
12.50%
87.50%
0.71%8
43
Cassiopeia
4.00
12.50%
62.50%
0.71%8
44
Lee Sin
4.63
0.00%
62.50%
0.71%8
45
Zaahen
4.00
0.00%
62.50%
0.71%8
46
Poppy
4.75
12.50%
62.50%
0.71%8
47
Zed
4.25
12.50%
62.50%
0.71%8
48
Nilah
5.25
12.50%
50.00%
0.71%8
49
Nunu & Willump
4.75
0.00%
50.00%
0.71%8
50
Master Yi
5.13
12.50%
50.00%
0.71%8
51
Annie
4.75
0.00%
50.00%
0.71%8
52
Riven
4.75
12.50%
37.50%
0.71%8
53
Leona
4.75
12.50%
37.50%
0.71%8
54
Rammus
5.50
12.50%
37.50%
0.71%8
55
Teemo
4.88
12.50%
37.50%
0.71%8
56
Heimerdinger
5.38
12.50%
37.50%
0.71%8
57
Senna
4.63
12.50%
37.50%
0.71%8
58
Garen
5.38
0.00%
25.00%
0.71%8
59
Yone
5.63
0.00%
25.00%
0.71%8
60
Viktor
5.50
0.00%
25.00%
0.71%8
61
Nasus
5.75
0.00%
12.50%
0.71%8
62
Wukong
2.86
14.29%
100.00%
0.62%7
63
Vel'Koz
3.86
28.57%
71.43%
0.62%7
64
Warwick
3.57
14.29%
71.43%
0.62%7
65
Sylas
4.29
14.29%
57.14%
0.62%7
66
Gwen
4.00
14.29%
57.14%
0.62%7
67
Akshan
4.71
0.00%
57.14%
0.62%7
68
Gragas
4.14
28.57%
57.14%
0.62%7
69
Tahm Kench
4.86
0.00%
57.14%
0.62%7
70
Vladimir
4.86
14.29%
57.14%
0.62%7
71
Kai'Sa
4.00
14.29%
57.14%
0.62%7
72
Malzahar
4.43
14.29%
42.86%
0.62%7
73
Viego
5.29
0.00%
42.86%
0.62%7
74
Kayle
5.57
0.00%
28.57%
0.62%7
75
Cho'Gath
5.14
28.57%
28.57%
0.62%7
76
Kalista
6.29
0.00%
0.00%
0.62%7
77
Galio
4.17
0.00%
83.33%
0.53%6
78
Tryndamere
3.00
16.67%
83.33%
0.53%6
79
Jinx
4.00
0.00%
66.67%
0.53%6
80
Fizz
4.00
16.67%
66.67%
0.53%6
81
Volibear
3.67
16.67%
66.67%
0.53%6
82
Rumble
4.33
0.00%
66.67%
0.53%6
83
Sion
3.67
16.67%
66.67%
0.53%6
84
Vi
4.17
16.67%
66.67%
0.53%6
85
Brand
4.00
0.00%
66.67%
0.53%6
86
Ambessa
4.50
0.00%
66.67%
0.53%6
87
Kassadin
4.83
0.00%
50.00%
0.53%6
88
Neeko
4.33
0.00%
50.00%
0.53%6
89
Ivern
4.50
16.67%
50.00%
0.53%6
90
Zeri
5.00
0.00%
50.00%
0.53%6
91
Malphite
4.67
0.00%
50.00%
0.53%6
92
Kayn
5.33
0.00%
33.33%
0.53%6
93
Yasuo
4.67
16.67%
33.33%
0.53%6
94
Veigar
5.17
0.00%
33.33%
0.53%6
95
Milio
5.67
0.00%
33.33%
0.53%6
96
Jarvan IV
7.00
0.00%
0.00%
0.53%6
97
Hwei
6.83
0.00%
0.00%
0.53%6
98
Rell
2.40
40.00%
100.00%
0.44%5
99
Swain
3.80
0.00%
80.00%
0.44%5
100
Alistar
3.60
0.00%
80.00%
0.44%5
101
Renekton
2.60
20.00%
80.00%
0.44%5
102
Aurelion Sol
4.00
0.00%
60.00%
0.44%5
103
Ziggs
4.40
0.00%
60.00%
0.44%5
104
Kindred
4.00
20.00%
60.00%
0.44%5
105
Thresh
4.20
20.00%
60.00%
0.44%5
106
Lissandra
5.00
0.00%
60.00%
0.44%5
107
Urgot
3.40
20.00%
60.00%
0.44%5
108
Karthus
3.80
20.00%
60.00%
0.44%5
109
Varus
3.60
40.00%
60.00%
0.44%5
110
Vex
4.00
20.00%
60.00%
0.44%5
111
Syndra
3.60
20.00%
60.00%
0.44%5
112
Anivia
3.60
40.00%
60.00%
0.44%5
113
Quinn
4.00
0.00%
60.00%
0.44%5
114
Zac
5.20
20.00%
40.00%
0.44%5
115
Soraka
5.60
0.00%
40.00%
0.44%5
116
Yuumi
5.20
0.00%
40.00%
0.44%5
117
Yunara
5.20
20.00%
40.00%
0.44%5
118
Aphelios
5.40
0.00%
40.00%
0.44%5
119
Taric
5.00
0.00%
40.00%
0.44%5
120
Seraphine
6.40
0.00%
20.00%
0.44%5
121
Illaoi
5.40
0.00%
20.00%
0.44%5
122
Zyra
5.80
0.00%
20.00%
0.44%5
123
Orianna
6.40
0.00%
20.00%
0.44%5
124
Nidalee
5.60
0.00%
20.00%
0.44%5
125
Akali
6.00
0.00%
20.00%
0.44%5
126
Fiora
5.60
0.00%
20.00%
0.44%5
127
Evelynn
7.00
0.00%
0.00%
0.44%5
128
Nami
2.50
25.00%
100.00%
0.35%4
129
Sona
4.00
0.00%
75.00%
0.35%4
130
Corki
4.00
0.00%
75.00%
0.35%4
131
Qiyana
3.25
25.00%
75.00%
0.35%4
132
Sivir
3.25
0.00%
75.00%
0.35%4
133
Nocturne
3.25
25.00%
75.00%
0.35%4
134
Ahri
5.00
0.00%
50.00%
0.35%4
135
Irelia
4.25
25.00%
50.00%
0.35%4
136
Azir
5.50
0.00%
50.00%
0.35%4
137
Bard
4.75
0.00%
50.00%
0.35%4
138
Zilean
4.50
25.00%
50.00%
0.35%4
139
Lucian
3.25
25.00%
50.00%
0.35%4
140
Hecarim
4.75
0.00%
50.00%
0.35%4
141
Karma
5.50
0.00%
50.00%
0.35%4
142
Naafiri
4.75
25.00%
50.00%
0.35%4
143
Lulu
6.00
0.00%
25.00%
0.35%4
144
Jayce
6.00
0.00%
25.00%
0.35%4
145
LeBlanc
6.75
0.00%
25.00%
0.35%4
146
Olaf
5.75
0.00%
25.00%
0.35%4
147
Ornn
6.00
0.00%
25.00%
0.35%4
148
Gnar
6.50
0.00%
25.00%
0.35%4
149
Draven
6.25
0.00%
25.00%
0.35%4
150
Braum
6.25
0.00%
25.00%
0.35%4
151
Udyr
4.50
0.00%
25.00%
0.35%4
152
Talon
5.75
0.00%
25.00%
0.35%4
153
Kha'Zix
6.75
0.00%
0.00%
0.35%4
154
Skarner
3.00
33.33%
100.00%
0.27%3
155
Aurora
4.00
0.00%
66.67%
0.27%3
156
Elise
4.67
0.00%
66.67%
0.27%3
157
Zoe
5.00
0.00%
33.33%
0.27%3
158
Rakan
5.33
0.00%
33.33%
0.27%3
159
K'Sante
5.67
0.00%
33.33%
0.27%3
160
Janna
5.33
0.00%
33.33%
0.27%3
161
Kled
7.67
0.00%
0.00%
0.27%3
162
Kennen
3.50
0.00%
100.00%
0.18%2
163
Kog'Maw
2.00
50.00%
100.00%
0.18%2
164
Taliyah
3.50
50.00%
50.00%
0.18%2
165
Miss Fortune
6.00
0.00%
50.00%
0.18%2
166
Sejuani
4.00
50.00%
50.00%
0.18%2
167
Samira
6.00
0.00%
0.00%
0.18%2
168
Xerath
7.50
0.00%
0.00%
0.18%2
169
Bel'Veth
5.00
0.00%
0.00%
0.18%2
Camille Augments
Augment
Pick Rate
1
Demon's Dance
Demon's Dance
13.69%155
2
Thread the Needle
Thread the Needle
9.54%108
3
Goliath
Goliath
9.28%105
4
Goredrink
Goredrink
8.04%91
5
Symphony of War
Symphony of War
8.04%91
6
Slow and Steady
Slow and Steady
7.42%84
7
Scopier Weapons
Scopier Weapons
7.33%83
8
Shrink Ray
Shrink Ray
7.33%83
9
Infernal Soul
Infernal Soul
6.45%73
10
Mystic Punch
Mystic Punch
5.74%65
11
The Brutalizer
The Brutalizer
5.65%64
12
Transmute: Prismatic
Transmute: Prismatic
5.48%62
13
Deathtouch
Deathtouch
5.12%58
14
Numb to Pain
Numb to Pain
4.68%53
15
Hybrid
Hybrid
4.59%52
16
Executioner
Executioner
4.59%52
17
escAPADe
escAPADe
4.51%51
18
Firebrand
Firebrand
4.24%48
19
Doomsayer
Doomsayer
3.98%45
20
Lightning Strikes
Lightning Strikes
3.71%42
21
Jeweled Gauntlet
Jeweled Gauntlet
3.71%42
22
Deft
Deft
3.62%41
23
Gamba Anvil
Gamba Anvil
3.45%39
24
Blunt Force
Blunt Force
3.45%39
25
Apex Inventor
Apex Inventor
3.27%37
26
Desecrator
Desecrator
3.18%36
27
Vulnerability
Vulnerability
3.09%35
28
Combo Master
Combo Master
3.00%34
29
Leg Day
Leg Day
3.00%34
30
Transmute: Gold
Transmute: Gold
3.00%34
31
Bread And Cheese
Bread And Cheese
3.00%34
32
Scoped Weapons
Scoped Weapons
3.00%34
33
Bread And Butter
Bread And Butter
2.92%33
34
Omni Soul
Omni Soul
2.83%32
35
Blade Waltz
Blade Waltz
2.83%32
36
Cerberus
Cerberus
2.74%31
37
Scopiest Weapons
Scopiest Weapons
2.74%31
38
Serve Beyond Death
Serve Beyond Death
2.74%31
39
Dual Wield
Dual Wield
2.65%30
40
Bravest of the Brave
Bravest of the Brave
2.65%30
41
Heavy Hitter
Heavy Hitter
2.56%29
42
Vengeance
Vengeance
2.47%28
43
Slap Around
Slap Around
2.47%28
44
It's Critical
It's Critical
2.39%27
45
Tap Dancer
Tap Dancer
2.39%27
46
Orbital Laser
Orbital Laser
2.30%26
47
Twice Thrice
Twice Thrice
2.30%26
48
Stats on Stats!
Stats on Stats!
2.21%25
49
Quest: Urf's Champion
Quest: Urf's Champion
2.21%25
50
Dreadbringer
Dreadbringer
2.21%25
51
Giant Slayer
Giant Slayer
2.12%24
52
Outlaw's Grit
Outlaw's Grit
2.03%23
53
Dematerialize
Dematerialize
2.03%23
54
Soul Siphon
Soul Siphon
2.03%23
55
Clown College
Clown College
2.03%23
56
Transmute: Chaos
Transmute: Chaos
2.03%23
57
Sacrifice: For Prismatic
Sacrifice: For Prismatic
2.03%23
58
Divine Intervention
Divine Intervention
1.94%22
59
Quantum Computing
Quantum Computing
1.94%22
60
Summoner Revolution
Summoner Revolution
1.86%21
61
Tank Engine
Tank Engine
1.86%21
62
Chain Lightning
Chain Lightning
1.77%20
63
Bodyguard
Bodyguard
1.77%20
64
Dashing
Dashing
1.77%20
65
Raid Boss
Raid Boss
1.77%20
66
Stats on Stats on Stats!
Stats on Stats on Stats!
1.77%20
67
Fan the Hammer
Fan the Hammer
1.77%20
68
Parasitic Relationship
Parasitic Relationship
1.77%20
69
Dawnbringer's Resolve
Dawnbringer's Resolve
1.68%19
70
Flashbang
Flashbang
1.68%19
71
Summoner's Roulette
Summoner's Roulette
1.68%19
72
Extendo-Arm
Extendo-Arm
1.59%18
73
Augmented Power
Augmented Power
1.59%18
74
Contract Killer
Contract Killer
1.59%18
75
Ocean Soul
Ocean Soul
1.50%17
76
Dark Blessing
Dark Blessing
1.50%17
77
Recursion
Recursion
1.50%17
78
Stats!
Stats!
1.50%17
79
Typhoon
Typhoon
1.41%16
80
Quest: Steel Your Heart
Quest: Steel Your Heart
1.41%16
81
Fruits of Your Labor
Fruits of Your Labor
1.41%16
82
Fallen Aegis
Fallen Aegis
1.33%15
83
Firefox
Firefox
1.33%15
84
Wisdom of Ages
Wisdom of Ages
1.33%15
85
Clothesline
Clothesline
1.33%15
86
Perseverance
Perseverance
1.24%14
87
Tank It Or Leave It
Tank It Or Leave It
1.24%14
88
Mad Scientist
Mad Scientist
1.24%14
89
Back To Basics
Back To Basics
1.24%14
90
Dive Bomber
Dive Bomber
1.24%14
91
With Haste
With Haste
1.24%14
92
Restless Restoration
Restless Restoration
1.15%13
93
Fey Magic
Fey Magic
1.15%13
94
Light 'em Up!
Light 'em Up!
1.15%13
95
It's Killing Time
It's Killing Time
1.06%12
96
Panic Room
Panic Room
1.06%12
97
Ultimate Roulette
Ultimate Roulette
1.06%12
98
Light Warden
Light Warden
1.06%12
99
Celestial Body
Celestial Body
1.06%12
100
Castle
Castle
1.06%12
101
Impassable
Impassable
1.06%12
102
Don't Chase
Don't Chase
1.06%12
103
Mountain Soul
Mountain Soul
1.06%12
104
Warmup Routine
Warmup Routine
1.06%12
105
We'll Be Right Back
We'll Be Right Back
0.97%11
106
Erosion
Erosion
0.97%11
107
Ultimate Revolution
Ultimate Revolution
0.97%11
108
Accelerating Sorcery
Accelerating Sorcery
0.97%11
109
Shadow Runner
Shadow Runner
0.97%11
110
Quest: Mad Hatter
Quest: Mad Hatter
0.97%11
111
Can't Touch This
Can't Touch This
0.97%11
112
Master of Duality
Master of Duality
0.88%10
113
Rabble Rousing
Rabble Rousing
0.88%10
114
Restart
Restart
0.88%10
115
Juice Box
Juice Box
0.88%10
116
Hat Trick
Hat Trick
0.88%10
117
Hold Very Still
Hold Very Still
0.88%10
118
Bread And Jam
Bread And Jam
0.88%10
119
Feel the Burn
Feel the Burn
0.88%10
120
Ethereal Weapon
Ethereal Weapon
0.80%9
121
Defensive Maneuvers
Defensive Maneuvers
0.80%9
122
Earthwake
Earthwake
0.80%9
123
Flashy
Flashy
0.80%9
124
Slow Cooker
Slow Cooker
0.80%9
125
Banner of Command
Banner of Command
0.80%9
126
Die Another Day
Die Another Day
0.80%9
127
Guilty Pleasure
Guilty Pleasure
0.80%9
128
Overflow
Overflow
0.80%9
129
Don't Blink
Don't Blink
0.80%9
130
Snowball Fight!
Snowball Fight!
0.80%9
131
Circle of Death
Circle of Death
0.71%8
132
Multitool
Multitool
0.71%8
133
Mirror Image
Mirror Image
0.71%8
134
Vanish
Vanish
0.71%8
135
Holy Fire
Holy Fire
0.71%8
136
Willing Sacrifice
Willing Sacrifice
0.71%8
137
Infernal Conduit
Infernal Conduit
0.71%8
138
Laser Eyes
Laser Eyes
0.71%8
139
Frost Wraith
Frost Wraith
0.71%8
140
Center of the Universe
Center of the Universe
0.71%8
141
Ultimate Unstoppable
Ultimate Unstoppable
0.71%8
142
Tormentor
Tormentor
0.62%7
143
Critical Healing
Critical Healing
0.62%7
144
Magic Missile
Magic Missile
0.62%7
145
Calculated Risk
Calculated Risk
0.62%7
146
From Beginning to End
From Beginning to End
0.62%7
147
Prismatic Egg
Prismatic Egg
0.62%7
148
Searing Dawn
Searing Dawn
0.62%7
149
Self Destruct
Self Destruct
0.62%7
150
Aim for the Head
Aim for the Head
0.62%7
151
Courage of the Colossus
Courage of the Colossus
0.62%7
152
Nesting Doll
Nesting Doll
0.62%7
Camille Prismatic ItemsThese are the best Prismatic items to buy on Camille
Turbo Chemtank
Turbo Chemtank

83.33%
12
Gargoyle Stoneplate
Gargoyle Stoneplate

82.35%
17
Demon King's Crown
Demon King's Crown

75%
56
Warmog's Armor
Warmog's Armor

70%
10
Divine Sunderer
Divine Sunderer

69.74%
271
Dragonheart
Dragonheart

69.23%
78
Moonflair Spellblade
Moonflair Spellblade

66.67%
12
Black Hole Gauntlet
Black Hole Gauntlet

65.31%
49
Shield of Molten Stone
Shield of Molten Stone

63.33%
30
Twin Mask
Twin Mask

63.27%
49
Lightning Rod
Lightning Rod

61.29%
31
Flesheater
Flesheater

61.02%
59
Hemomancer's Helm
Hemomancer's Helm

60.5%
238
Gambler's Blade
Gambler's Blade

60%
10
Goredrinker
Goredrinker

59.21%
76
Galeforce
Galeforce

58.82%
34
Pyromancer's Cloak
Pyromancer's Cloak

58.82%
17
Sword of the Divine
Sword of the Divine

58.33%
48
Duskblade of Draktharr
Duskblade of Draktharr

58.06%
93
Cloak of Starry Night
Cloak of Starry Night

56.52%
23
Hexbolt Companion
Hexbolt Companion

56%
25
Darksteel Talons
Darksteel Talons

55.77%
52
Hamstringer
Hamstringer

53.66%
41
Talisman Of Ascension
Talisman Of Ascension

51.85%
27
Prowler's Claw
Prowler's Claw

50%
56
Reverberation
Reverberation

50%
44
Kinkou Jitte
Kinkou Jitte

48.41%
126
Reaper's Toll
Reaper's Toll

46.94%
49
Fulmination
Fulmination

46.74%
92
Force Of Entropy
Force Of Entropy

46.67%
15
Regicide
Regicide

45.88%
85
Skill Priority
Camille's Q: Precision Protocol
Q
Camille's E: Hookshot
E
Camille's W: Tactical Sweep
W
53.25% WR
661 Matches
Skill PathMost popular ability leveling order
Camille's Q: Precision Protocol
Q
Precision Protocol
1
4
5
7
8
Camille's W: Tactical Sweep
W
Tactical Sweep
2
14
15
17
18
Camille's E: Hookshot
E
Hookshot
3
9
11
12
13
Camille's R: The Hextech Ultimatum
R
The Hextech Ultimatum
6
10
16
Camille's Passive: Adaptive Defenses
P
Adaptive Defenses
Starting Items
52.83% WR
106 Matches
Always buy first
2nd & 3rd Items
58.18% WR
110 Matches
Build this every game
Fourth Item
64.15% WR
106 Matches
72.41% WR
29 Matches
Fifth Item
76.67% WR
30 Matches
80.77% WR
26 Matches
76.19% WR
21 Matches
Sixth Item
85.71% WR
7 Matches
100% WR
5 Matches
100% WR
5 Matches
Consumables
89.24% WR
223 Matches
91.33% WR
150 Matches
95.92% WR
49 Matches

© 2017-2026 Outplayed Inc.

U.GG Stats isn't endorsed by Riot Games and doesn't reflect the views or opinions of Riot Games or anyone officially involved in producing or managing League of Legends.

Links

  • FAQ
  • Careers

Terms

  • Privacy Policy
  • Terms of Service

Socials

  • Discord
  • Twitter
  • YouTube
  • Instagram
  • Facebook

Our Brands

  • Icy Veins
  • The Sims Resource
  • Addicting Games
  • Fantasy Football Scout
  • Pocket Gamer