278Challenge Profile / EUW
spidey#HRT
Latest Riot challenge data cached by Lolytics.
Updated 9h ago
14,505
Challenge crystal
Diamond
Overall challenge tier
273
273 cached rows
May 9
Riot payload refresh
Challenge Progress
Earned and progressed challenges
273 cached challenges
Get Paid, and Get Out
#1 | Top 0.1% | 33,739,605
#1
Ladder placement
Executioner
#1 | Top 0.1% | 900
#1
Ladder placement
Gets The Wurm
#30,039 | Top 0.1% | 385
#30,039
Ladder placement
Dragon Hunt
#24,340 | Top 0.1% | 70
#24,340
Ladder placement
Ability Abuse
#-66,135 | Top 1.3% | 626,018
#1
Ladder placement
Do These Things Have Souls?
#-72,063 | Top 1.4% | 353,816
#1
Ladder placement
The Jukes!
#-196,834 | Top 3.7% | 7,427
#1
Ladder placement
Dinner's Ready
#-76,587 | Top 1.5% | 6,742
#1
Ladder placement
Turret Toppler
#-82,045 | Top 1.6% | 4,584
#1
Ladder placement
Master of the Rift
#-22,467 | Top 1.1% | 2,736
#1
Ladder placement
Killing Spree Spree
#-74,733 | Top 1.4% | 1,893
#1
Ladder placement
Damage Dispenser
#-63,306 | Top 1.2% | 1,387
#1
Ladder placement
Mid Diff
#54,399 | Top 0.2% | 649
#54,399
Ladder placement
On Another Level
#-47,800 | Top 0.9% | 509
#1
Ladder placement
Target Selection
#-62,552 | Top 1.2% | 384
#1
Ladder placement
Soul Sweep
#-70,486 | Top 1.3% | 289
#1
Ladder placement
Global Defense System
#-217,870 | Top 4.1% | 240
#1
Ladder placement
One Stone
#-37,489 | Top 0.7% | 180
#1
Ladder placement
Can't Miss
#-36,152 | Top 0.7% | 152
#1
Ladder placement
Unkillable Demon King
#-56,407 | Top 1.1% | 69
#1
Ladder placement
Team Diff
#69,464 | Top 0.3% | 17
#69,464
Ladder placement
Overwhelming Presence
#99,355 | Top 0.4% | 5
#99,355
Ladder placement
Field Medic
#-172,848 | Top 2.6% | 2,288,123
#1
Ladder placement
Everyone Pays!
#-254,881 | Top 3.8% | 473,011
#1
Ladder placement
A Honeyfruit a Day: 2024 Split 3
Top 9.6% | 50,832
Restore health through map-based healing sources
Immediate Immobilization
#-302,001 | Top 4.5% | 42,826
#1
Ladder placement
Little Inanimate Spies
#-186,106 | Top 2.8% | 25,776
#1
Ladder placement
Team Takedown
#-304,236 | Top 4.5% | 24,781
#1
Ladder placement
Above-Average Assistance
#-151,258 | Top 2.2% | 18,962
#1
Ladder placement
Hard Day's Killin'
#-207,928 | Top 3.1% | 15,730
#1
Ladder placement
Stun n Gun
#-181,367 | Top 2.7% | 7,290
#1
Ladder placement
Solo Bolo
#-154,875 | Top 2.3% | 4,796
#1
Ladder placement
Go Where You Please
#-251,459 | Top 3.7% | 4,342
#1
Ladder placement
Darkness is Everywhere
#-377,486 | Top 5.6% | 3,443
#1
Ladder placement
No Quarter
#-267,011 | Top 3.9% | 3,381
#1
Ladder placement
Brush Fanatic
#-261,721 | Top 3.9% | 3,221
#1
Ladder placement
Never Tell Me the Odds
#-206,453 | Top 3% | 2,969
#1
Ladder placement
Medal of Honor
Top 1.8% | 2,830
Earn progress from challenges in the Executioner, Commando, Resourceful, and Mystic groups
Insec-urity Breach
#-266,147 | Top 3.9% | 2,709
#1
Ladder placement
Lizard Hunting
#-157,435 | Top 2.3% | 1,935
#1
Ladder placement
Multikill Madness
#-243,871 | Top 3.6% | 1,826
#1
Ladder placement
Nice Try
#-241,750 | Top 3.6% | 1,699
#1
Ladder placement
Ascendant
Top 0.7% | 1,460
Earn progress from challenges in the Domination, Unrivaled, and Perfection groups
Determination
Top 2.1% | 1,395
Earn progress from challenges in the Monster Hunter, Steadfast, and Symbiosis groups
Making the Dream Work
#-379,091 | Top 5.6% | 1,314
#1
Ladder placement
Golden
Top 3.3% | 996
Have more than 450 gold per minute in a game
Splitpush Strategy
#-99,556 | Top 1.5% | 718
#1
Ladder placement
The Brush Has Eyes
#-248,711 | Top 3.7% | 708
#1
Ladder placement
A Drake and a Hard Place
Top 2.1% | 700
Kill opponents with help from an Epic monster
Movin' On Up
#-245,683 | Top 3.6% | 692
#1
Ladder placement
Resourceful
#74,968 | Top 0.3% | 660
#74,968
Ladder placement
Ward Ward-en
#-351,912 | Top 5.2% | 626
#1
Ladder placement
Top Performer
#-326,600 | Top 4.8% | 579
#1
Ladder placement
Wurm Fishing
#-351,210 | Top 5.2% | 570
#1
Ladder placement
Strategy
Top 1.6% | 560
Earn progress from challenges in the Strategy group
Baron Power Play
#-306,755 | Top 4.5% | 538
#1
Ladder placement
KDA Player
#-171,638 | Top 2.5% | 519
#1
Ladder placement
Slayer
Top 2.3% | 460
Earn progress from challenges in the Slayer group
Domination
Top 3.1% | 460
Earn progress from challenges in the Domination group
Flawless Ace
#-214,915 | Top 3.2% | 456
#1
Ladder placement
Support Subsidy
#-124,567 | Top 1.9% | 445
#1
Ladder placement
Steadfast
Top 5.9% | 440
Earn progress from challenges in the Steadfast group
Synergy
Top 2.5% | 440
Earn progress from challenges in the Synergy group
Innovation
Top 2.5% | 425
Earn progress from challenges in the Innovation group
Unrivaled
Top 1% | 400
Earn progress from challenges in the Unrivaled group
Adept
Top 3% | 360
Earn progress from challenges in the Adept group
Support Diff
#-132,812 | Top 3.1% | 333
#1
Ladder placement
Pain Prescriber
#-222,497 | Top 3.3% | 302
#1
Ladder placement
Mystic
Top 2.4% | 300
Earn progress from challenges in the Mystic group
Shattered Plates
#-217,838 | Top 3.2% | 297
#1
Ladder placement
Lane Domination
#-237,397 | Top 3.5% | 281
#1
Ladder placement
Top Diff
#-117,983 | Top 3.2% | 276
#1
Ladder placement
Bouncer
#-84,541 | Top 1.3% | 275
#1
Ladder placement
Bloodcrazed
Top 3.3% | 247
Get First Bloods
Shoddy Construction
#-333,006 | Top 4.9% | 236
#1
Ladder placement
Aggressive Positioning
Top 2.4% | 217
Get multikills after flashing towards an enemy
Uninhibited
Top 4.8% | 211
Win after losing an inhibitor
Lane Command
#-252,210 | Top 3.7% | 186
#1
Ladder placement
Level 1 Fiesta
#-207,407 | Top 3.1% | 131
#1
Ladder placement
Legendary Legend
#-136,491 | Top 2% | 131
#1
Ladder placement
Lethal Efficiency
#-228,701 | Top 3.4% | 126
#1
Ladder placement
Incredible Value
#-417,306 | Top 6.2% | 120
#1
Ladder placement
No Loyalty Among Dragons
Top 5.4% | 86
Take Elder Dragons when enemy has the Dragon Soul
Incandescent
Top 10.8% | 66
Obtain <em>mage champions</em>
Open Victory
Top 11.2% | 63
Win with an open nexus
No Capstone Unturned
Top 7.5% | 52
Reach Gold tier on Capstones
Inspiring
Top 14.7% | 36
Obtain <em>support champions</em>
Comeback Kids
Top 5.7% | 34
Win after being down 15 kills
Dragon's Fury
Top 3.6% | 34
Get multikills with Elder Dragon
Ingenious
Top 10.5% | 30
Obtain <em>marksman champions</em>
Prodigy
Top 7.2% | 18
Become Legendary within 15 minutes
DPS Threat
#-1,074,444 | Top 16% | 17
#1
Ladder placement
Immortal
Top 3.2% | 15
Win a game with more than eight kills without dying
Whose Lane is it Anyway
#73,621 | Top 0.3% | 13
#73,621
Ladder placement
PENTAKIIIIIIIIL!!
#-134,937 | Top 2% | 8
#1
Ladder placement
Flawless Victory
Top 10.3% | 7
Win a Perfect Game
Wise Master
Top 6.7% | 3,333,725
Earn Mastery Points
One-Trick
Top 7% | 330,943
Gain Mastery Points on a single champion
EXPERTISE
Top 4.4% | 4,470
EXPERTISE capstone
VETERANCY
Top 4.6% | 3,715
VETERANCY capstone
Give 'em Shell, Shelly
Top 5.4% | 1,865
Take turrets with Rift Herald
Captain
Top 5.7% | 1,660
Earn progress from challenges in the Strategy, Demolition, Synergy, and Team Spirit groups
Might
Top 3.5% | 1,460
Earn progress from challenges in the Flair, Behemoth, Slayer, and Predator groups
Fun with Friends
Top 4.5% | 1,124
Play games with a group
Cleverness and Creativity
Top 5.4% | 980
Earn progress from challenges in the Style, Innovation, and Tactician groups
Goodbye to the Darkness!
Top 5.4% | 919
Place Control Wards
Commando
Top 5.5% | 610
Earn progress from challenges in the Commando group
Mastermind
Top 4.6% | 540
Earn progress from challenges in the Cornerstone and Visionary groups
Champion
Top 15.8% | 520
Earn progress from challenges in the Champion group
Monster Hunter
Top 8.2% | 445
Earn progress from challenges in the Monster Hunter group
Flair
Top 5.5% | 365
Earn progress from challenges in the Flair group
Ace
Top 2.3% | 345
Earn progress from challenges in the Ace group
Perfection
Top 7% | 340
Earn progress from challenges in the Perfection group
Shell Collecting
Top 3.4% | 312
Take down Rift Heralds
Symbiosis
Top 9.7% | 290
Earn progress from challenges in the Symbiosis group
Been Here a While
Top 8.5% | 277
Increase your summoner level
Overachiever
Top 4.4% | 245
Earn progress from challenges in the Overachiever group
Darkness Distributer
Top 2.4% | 245
Take down the most wards in the game
Visionary
Top 8.2% | 240
Earn progress from challenges in the Visionary group
Team Spirit
Top 5.7% | 225
Earn progress from challenges in the Team Spirit group
Alcove Gaming
Top 5% | 216
Take down opponents in the alcove
Dragon On Too Long
Top 2.6% | 206
Take down first dragon before eight minutes
Tactician
Top 5.5% | 200
Earn progress from challenges in the Tactician group
Cornerstone
Top 2.3% | 180
Earn progress from challenges in the Cornerstone group
Behemoth
Top 5.6% | 175
Earn progress from challenges in the Behemoth group
Blink and You'll Miss It
Top 3.5% | 146
Kill champions from full health in 1.5 seconds
Spice of Life
Top 13% | 145
Obtain <em>champions</em>
Dancing Shoes
Top 7.5% | 138
Dodge five skillshots within eight seconds
Style
Top 5.2% | 135
Earn progress from challenges in the Style group
Farm Champs not Camps
Top 4.6% | 128
As jungler, get kills on laners before 10 minutes
Entitled
Top 4.8% | 90
Earn titles from challenges
Get On My Level
Top 3.3% | 74
Get takedowns after gaining an early level advantage
Not Even a Scratch
Top 7.8% | 57
Take 10k damage in a fight and survive
Death Incarnate
Top 3.7% | 43
Take down 12 champions within 15 minutes
Invisible
Top 13.6% | 41
Obtain <em>assassin champions</em>
Flame Horizon
Top 2.9% | 41
Win games with 100+ more CS than role opponent
Invulnerable
Top 15.9% | 36
Obtain <em>tank champions</em>
Draconic Extinction
Top 18.9% | 19
Kill two Elder Dragons in a single game
Plant Tactics
Top 5.7% | 19
Use blast cones to escape enemies
Right Under Their Noses
Top 6% | 18
Recall while unseen by a nearby champion
Can of Wurms
Top 21.4% | 12
Kill three Barons in a single game
It Has "Ultimate" In the Name!
Top 8.8% | 6
Win with a 5-stack with 3+ <em>champs with a large AOE ult</em>
Lightning Round
Top 8.8% | 6
Win games before 13 min
Victorious Regalia
Top 8.7% | 4
Collect <em>victorious champion skins</em>
TEAMWORK
Top 8% | 3,555
TEAMWORK capstone
IMAGINATION
Top 9.2% | 1,615
IMAGINATION capstone
COLLECTION
Top 12% | 1,150
COLLECTION capstone
Sage
Top 4.3% | 745
Earn progress from challenges in the Guru, Virtuoso, and Ace groups
That Was Close
Top 2.9% | 642
Save an ally with a heal or shield
Magnum Opus
Top 7.5% | 290
Earn progress from challenges in the Magnum Opus group
ARAM Warrior
Top 14% | 215
Earn progress from challenges in the ARAM Warrior group
Guru
Top 5.9% | 200
Earn progress from challenges in the Guru group
2024 Seasonal: Split 3
Top 11.7% | 195
Earn points from challenges in the 2024 Seasonal: Split 3 group
Superior Supporting
Top 1.9% | 157
Finish your support quest faster than your opponent
Demolition
Top 5.6% | 135
Earn progress from challenges in the Demolition group
Leading by Example
Top 2.6% | 130
Get an assist streak of 12+ without dying
Target Secured
Top 6.4% | 114
Secure Epic Monsters with the enemy jungler nearby
Challenges are Forever
Top 7.4% | 110
Reach Diamond tier on different challenges
Jack of All Champs
Top 1.8% | 109
Win games with <em>different champions</em>
All-Seeing
Top 3.2% | 91
Have over 2 vision score per minute
Masterful Performance
Top 4% | 82
Reach Masters tier on different challenges
Perfectionist
Top 0.7% | 50
Earn an S+ grade with <em>different champions</em>
Indomitable
Top 20.5% | 47
Obtain <em>fighter champions</em>
Invincible
Top 0.9% | 44
Win without dying with <em>different champions</em>
Who Needs 'Em
Top 29.8% | 35
Win a game despite an AFK teammate
Ward Hunter
Top 5.1% | 12
Destroy 10 wards before 20 minutes
Meat Shield
Top 5.6% | 10
Win the game taking at least 35% of team damage
Double Ace
Top 9.7% | 5
Have both teams be aced in the same fight
Lane Domination: 2024 Split 3
Top 10.7% | 4
Be up 20% gold and XP at 14min
Nowhere to Hide
Top 4.5% | 3
Win with a 5-stack of <em>champs with 3+ global abilities</em>
Wave Goodbye
Top 31.5% | 1
Kill 20 minions within 3 Seconds
It was a... Near-Hit
Top 11.5% | 11,620 / 21,600
Dodge skillshots
Another Day, Another Bullseye
Top 11.1% | 8,710 / 15,000
Hit skillshots on champions
Farm Champs Not Minions
Top 10.2% | 6,496 / 12,500
Get Takedowns
Free Money
Top 11.9% | 5,546 / 17,000
Kill minions
Dine Out
Top 7.6% | 2,337 / 4,000
Kill jungle monsters in the enemy jungle
Scuttle Along Now
Top 10.3% | 621 / 750
Kill scuttle crabs
ARAM Authority
Top 15.4% | 545 / 590
Earn progress from challenges in the ARAM Warrior, ARAM Finesse, and ARAM Champion groups
No Hiding
Top 12.3% | 346 / 650
Kill enemies near one of their turrets
Buff Burglar
Top 10.2% | 272 / 360
Take enemy buffs
Predator
Top 9% | 215 / 240
Earn progress from challenges in the Predator group
Harmony
Top 6.9% | 200 / 320
Earn progress from challenges in the Harmony group
Fashionably Late
Top 2.1% | 165 / 375
Get a takedown after teleporting to a >4 champion fight
Connoisseur
Top 12.6% | 150 / 240
Earn progress from challenges in the Connoisseur group
ARAM Champion
Top 12.6% | 140 / 185
Earn progress from challenges in the ARAM Champion group
Not Even Close
Top 40.4% | 119
Survive champion combat on single digit health
Arena Brawler
Top 8.2% | 105 / 145
Deal the most damage to champions in the game
ARAM Finesse
Top 12.4% | 100 / 140
Earn progress from challenges in the ARAM Finesse group
NA-RAM
Top 10.8% | 96 / 150
Win games
Synchronicity
Top 9.1% | 75 / 80
Earn progress from challenges in the Synchronicity group
Jungle Diff
Top 6.1% | 75 / 100
Win games as a Jungler
Icon of the Rift
Top 20.5% | 68 / 100
Obtain Summoner Icons
Always On Time
Top 7% | 66 / 150
Kill Epic Monsters within 30 seconds of spawn
Emotive
Top 19.1% | 51 / 80
Obtain emotes
Fashion Forward
Top 17.9% | 41 / 75
Collect champion skins
Let's Make This Quick
Top 27.9% | 29
Destroy the enemy nexus in less than 15 minutes
No Hiding: 2024 Split 3
Top 8.6% | 26 / 40
Kill enemies near one of their own turrets
Fashionista
Top 10.5% | 23 / 30
Collect chromas
Clutch Steal
Top 10.8% | 23 / 25
Steal Epic monsters
Ten Minute Turret
Top 1.6% | 22 / 40
Destroy the first turret in under 10 minutes
Bad Medicine
Top 12.1% | 19 / 45
Kill enemies recently healed by a health pack
TY for Leash
Top 11.1% | 17 / 20
Steal an Epic Monster without Smite
All Random All Flawless
Top 12.8% | 10 / 20
Earn S grades or higher
Clean Clears
Top 7.8% | 7
Get 70 CS from jungle monsters before 10 minutes
Ladder Climber
Top 15.9% | 6 / 9
Earn rank in Solo/Duo Queue
Stacks on Stacks on Stacks
Top 3% | 3
Fully stack Mejai's before 20 minutes
ARAM Eradication
Top 14.7% | 2
Get Pentakills
We're Good Over Here
Top 10.2% | 2
Win with a 5-stack with 3+ <em>poke champs</em>
Epic Steal
Top 8.1% | 1
Steal two Epic Monsters in one game
Winhibitors
Top 24.7% | 1
Destroy all three enemy inhibitors in under 25 minutes
They Just... Don't... DIE!
Top 7.1% | 1
Win with a 5-stack of 3+ champions that <em>defy death</em>
Where'd They Go?
Top 4% | 1
Win with a 5-stack with 3+ <em>champs with stealth</em>
Get Over Here
Top 8.3% | 1
Win with a 5-stack with 3+ <em>champs with displacements</em>
Dine In
Top 11.9% | 11,051 / 12,000
Kill jungle monsters in your jungle
Alliance
Top 14.9% | 325 / 620
Earn progress from challenges in the Clash, Synchronicity, Harmony, and Globetrotter groups
Snow Day
Top 14.7% | 190 / 300
Hit snowballs on champions
Virtuoso
Top 10.8% | 85 / 100
Earn progress from challenges in the Virtuoso group
Treasure
Top 33.7% | 60 / 70
Earn progress from challenges in the Treasure group
Master Yourself
Top 6.1% | 42 / 50
Earn Mastery 5 on <em>different champions</em>
Nowhere is Safe
Top 27.5% | 31
Take down champions in their fountain
Master the Enemy (Legacy)
Top 5.5% | 19 / 25
Earn Mastery 7 on <em>different champions</em>
Champion Ocean: 2024 Split 3
Top 9% | 19 / 20
Win games with <em>different champions</em>
I've Got You!
Top 6.2% | 18 / 20
Save an ally with a heal or shield
All Random All Champions
Top 10% | 17 / 30
Earn an S- grade on <em>different champions</em>
Crab Wrangler
Top 11.2% | 14 / 25
Take both of the first scuttle crab spawns
Three Buffed
Top 9.3% | 7 / 10
Take 3 of the first 4 buff camps
Dedicated Master: 2024 Split 3
Top 9% | 6 / 10
Earn Mastery Milestones
Master Marksman (Legacy)
Top 4.7% | 5 / 10
Get Mastery 7 on different <em>marksmen</em>
Master Support (Legacy)
Top 4.7% | 5 / 10
Get Mastery 7 on different <em>supports</em>
That Drip
Top 18.8% | 3 / 4
Collect many skins for a single champion
Forever Triumphant
Top 12.3% | 3
End season splits ranked Gold or higher
Captain Jack
Top 10.6% | 3
Cleanse an immobilizing effect within 0.25s
ARAM Legend
Top 16.7% | 1
Go Legendary
Damage Sponge
Top 17.9% | 1
In one fight, get kills while tanking all five enemies and survive
Power Pair
Top 12.5% | 55 / 60
Win with a premade party of two in a ranked queue
Bot Diff
Top 10.7% | 46 / 50
Win games as a Bot Carry
Fancy Garb
Top 18.3% | 17 / 25
Collect <em>epic champion skins</em>
Player Diff
Top 5.5% | 13 / 20
Win games queued as Fill
Master Mage (Legacy)
Top 7.2% | 11 / 12
Get Mastery 7 on different <em>mages</em>
Master the Enemy
Top 5% | 8 / 15
Earn Mastery 10 on <em>different champions</em>
Go Shelly Go!
Top 13.9% | 7 / 20
Take 2 turrets with the same Rift Herald
Master Assassin (Legacy)
Top 5.3% | 7 / 10
Get Mastery 7 on different <em>assassins</em>
Double Down
Top 9.8% | 6 / 9
Get double kills
Legendary Wardrobe
Top 17.3% | 5 / 7
Collect <em>legendary champion skins</em>
Same Penta, Different Champ
Top 3% | 4 / 5
Get a Pentakill with <em>different champions</em>
Ward Skin Collector
Top 50% | 4 / 5
Obtain ward skins
The Most Dangerous Game
Top 18% | 3 / 5
As jungler, kill the enemy jungler in their jungle before 10 minutes
Outplaying the Odds
Top 9.8% | 2 / 4
Get kills while outnumbered
The Wall
Top 11.6% | 2
Take 10k damage in a fight and survive
Rapid Demolition
Top 15.4% | 2 / 3
Take the first turret before 5 min
Pop Goes the Poro
Top 19.2% | 1
Cause a Poro to explode
Arena Champion Ocean
Top 7.4% | 12 / 15
Play Arena games with <em>different champions</em>
Experience
Top 16% | 10 / 25
Earn progress from challenges in the Experience group
Vintage Look
Top 35.8% | 9 / 10
Collect <em>legacy champion skins</em>
Old Friends
Top 15.8% | 6 / 10
Achieve milestones on Eternals for a single champion
Mile Marker
Top 17.4% | 6 / 7
Earn milestones on any Eternal
Arena Champion
Top 7.4% | 5 / 10
Earn progress from challenges in the Arena Champion group
Recursive
Top 16.4% | 4 / 5
Complete collection challenges
Master Assassin
Top 10.9% | 4 / 5
Get Mastery 10 on different <em>assassins</em>
Master Mage
Top 12.3% | 4 / 5
Get Mastery 10 on different <em>mages</em>
Active Participant
Top 18.8% | 4 / 5
Have over 90% Kill Participation in games
Master Fighter (Legacy)
Top 16.9% | 3 / 5
Get Mastery 7 on different <em>fighters</em>
Best Friends Forever
Top 20.1% | 2 / 5
Get wins with a premade of 5
Master Support
Top 9.2% | 2 / 3
Get Mastery 10 on different <em>supports</em>
Master Fighter
Top 10.8% | 2 / 5
Get Mastery 10 on different <em>fighters</em>
Malfunction
Top 36.5% | 1 / 5
Win games
Master Tank (Legacy)
Top 14.2% | 1 / 3
Get Mastery 7 on different <em>tanks</em>
Master Marksman
Top 8.7% | 1 / 3
Get Mastery 10 on different <em>marksmen</em>
Robo Recall
Top 100% | 23 / 50
Get kills
Machine-Hunting Mercenary
Top 100% | 5 / 15
Earn progress from challenges in the Machine-Hunting Mercenary group
Pocket Picks: 2024 Split 3
Top 100% | 4
Complete a Mastery Set
Protean Override
Top 100% | 1 / 3
Win games with <em>different champions</em>
Adapt to All Situations
Top 100% | 1 / 3
Place first in Arena games with <em>different champions</em>