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League of Legends patch 10.21 notes - Preseason 2021 changes, Odyssey, Harrowing skins

League of Legends patch 10.21 is enormous! There's plenty to catch up on for Preseason 2021, so read on

October 14, 2020 League of Legends patch 10.21 is now rolling onto live servers!

Be sure to check out the LoL patch 10.23 notes for the latest changes being tested on the PBE going into Preseason 2021. Patch 10.21 notes follow.

As the days grow chillier and the evenings darker, the League of Legends 2020 patch cycle just keeps on rolling. LoL patch 10.20 has leapt from the testing grounds of the MOBA game’s PBE and onto live servers, which means all those balance changes and dragon-themed skins should be available very soon. Now, it’s time for patch 10.21 to make its glorious debut on the PBE – and, oh boy, is it a big one.

The first thing worth mentioning is, yes, that recent League of Legends Halloween skins leak was indeed accurate – Amumu and Elise are getting some spooky new skins with the coming patch. Officially called Bewitching Elise and Pumpkin Prince Amumu, the splash art we saw before is now officially confirmed, and we’ve got a look at these in-game in the Champion skins section below – along with several others.

Speaking of which, there’s a bunch of lucky Champs also getting new looks from the futuristic galaxy-themed Odyssey line in the next update. Aatrox, Karma, Kha’Zix, Sivir, and Twisted Fate are on the list, and Fizz and Kassadin aren’t left out, either – they’re in for a Little Devil and Hextech skin, respectively.

As for gameplay changes, there are plenty of major updates already up for a round o’ tweaking and tinkering for Preseason 2021 – but the process of testing these is a little more complex than usual. As Lead gameplay designer Mark Yetter explains here, the Preseason content will be on the PBE for “an extended period of time”, it’ll alternate time with the ‘regular’ patches on the testing servers (switching out on Thursdays, it seems), like so:

  • Week one – Preseason
  • Week two – Patch 10.21
  • Week three – Preseason
  • Week four – Patch 10.22
  • Weeks five and six – Preseason

That means there will be different ‘sets’ of balance changes – the Preseason changes and the regular 10.21 changes. We’ve split these off for you to see below, labelled as ‘Preseason balance changes’ and ‘Patch 10.21 balance changes’, so you can see what’s what. Expect the changes in the 10.21 section to arrive when the patch goes live; the Preseason changes will follow once the extended period is done (but they’ll stay here in the notes anyway so you can see what’s being tested over the longer period).

The massive item system overhaul that Riot’s been discussing in recent weeks has landed on the PBE – including the new LoL item type, Mythics – as well the brand-new shop interface and item icon updates.  and senior Champion designer August Browning have posted a bunch of threads and notes helping to explain these changes on social media, which we’ve included in the notes below.

There are also lots of Champion-specific changes up for testing, too, which are designed to make sure everything’s working correctly given the major item system updates “maintaining compelling build choices”, as Browning explains. Plus, we’ve added some details about some rune and other item changes up for testing, too.

Oh, and one other little thing – Riot’s only gone and announced League’s next Champ! Seraphine, The Starry-Eyed Songstress, is headed to the PBE on October 13, and when she does, we’ll update these here notes with all the details you need to know. In the meantime, check out this post detailing League of Legends’ Seraphine abilities (and bio).

Read on to check out the League of Legends patch 10.21 notes and Preseason patch notes (cheers, Surrenderat20):


As reflected in the 2020 League of Legends patch schedule, LoL patch 10.21 is due to go live on Wednesday, October 14, 2020 – though, again, it’s worth noting that much of the Preseason content is due to stay on the PBE for an extended period of “six full weeks”, so won’t go live on that date. Maintenance times for the patch itself have now been been confirmed – they’ll begin at 03:00 PT for NA servers, 05:00 BST for EUW servers, and 03:00 CET for EUNE servers, and last for approximately three hours.


Patch 10.21 Balance Changes

Here’s a preview of all the LoL Patch 10.21 balance changes we’ll see hitting the PBE for this round of testing:

Aphelios – buffed

The Hitman and the Seer (Passive):
Ability’s lethality increased to 3/6/9/12/15/18 from 2/4/6/8/10/12
Moonlight Vigil (R):
Healing from Severum increased to 250/375/500 from 200/300/400
Chakrams for Crescendum increased to 4 from 3
Mark damage dealt by Calibrum increased to 40/70/100 from 20/40/70
Gravitum’s root effect increassed to 1.25 seconds from 1 second

Camille – nerfed

Hookshot (E):
Ability’s attack speed decreased to 40/45/50/55/60% from 40/50/60/70/80%

Corki – buffed

Phosphorous Bomb (Q):
Ratio of ability’s bAD increased to 70% from 50%

Graves – nerfed

Quickdraw (E):
True Grit armour (per stack) decreased to 6/9/12/15/18 from 8/11/14/17/20

Hecarim – nerfed

Devastating Charge (E):
Base level of damage dealt decreased to 35/65/95/125/155 from 45/75/105/135/165
Maximum level of base damage dealt decreased to 70/130/190/250/310 from 90/150/210/270/330

Karma – buffed

Gathering Fire (Passive):
Reduction of Mantra cooldown (spells) increased to [2/4/6 at levels 1/6/11] from [2/3/4 at levels 1/7/13]
Reduction of Mantra cooldown (attacks) adjusted to a flat 1 at all levels from [1/1.5/2]
Mantra (R):
Ability cooldown decreased to 40/38/36/34/34 from 45/42/39/36/36

Lee Sin – buffed

Attack Damage dealt per level increased to 3.7 from 3.2

Nidalee – nerfed

Base level Attack Damage decreased to 58 from 61

Pantheon – changed

Comet Spear (Q):
Damage dealt changed to [70/100/130/160/190 (+115% bAD)] from [75/110/145/180/215 (+100% bAD)]
Level scaling of Mortal Will Bonus increased to 115% bAD from 100% bAD

Samira – nerfed

Wild Rush (E):
Ability’s cooldown increased to 20/18/16/14/12 seconds from 15/14/13/12/11 seconds
Ability’s Attack Speed decreased to 20/25/30/35/40% from 30/35/40/45/50%

Trundle – buffed

King’s Tribute (Passive):
Healing effect changed to 2-7% scaling along with level from 2/3/4/5/6% at levels 1/5/9/12/15
Frozen Domain (W):
Ability’s cooldown changed to 15/14/13/12/11 from a flat 15

Udyr – buffed

Phoenix Stance (R):
Pulse Damage dealt increased to 50/100/150/200/250/300 from 40/80/120/160/200/240

Patch 10.21 Rune Changes

Nimbus Cloak (S2):

Movement speed effect changed to 5/20/35% from 10/20/30%
Duration of rune’s effect decreased to 2 seconds from 2.5 seconds



Preseason Champion Changes

  • It’s worth noting, League fans, you might want to head on down to the Item and Shop Changes section below to get a fuller idea of the context behind the following Champion changes!
(“The goal of most of these changes is to ensure the champions work correctly with the new item system while maintaining compelling build choices”)

Caitlyn – nerfed

Headshot (Passive):
Crit chance now grants 25% less bonus damage to headshots

Jhin – changed

Whisper (Passive):
Damage reduction from crit changed to [14% (150% damage crits)] from [25% (150% damage crits)]
Crit chance Bonus AD decreased to [3% AD per 10% crit] from [4% AD per 10% crit]

Katarina – changed

Voracity (Passive):
This ability “now applies on-hit effects to all units struck”
Shunpo (E):
This ability now applies on-hit effects
Death Lotus (R):
“Split damage into (Base + AP ratio) Magic damage, and (AD + Attack speed ratio) physical damage.”
This “now applies on-hit effects at 33% efficiency to all units struck (each unit is hit for a total of 3 x Kat’s on-hits over the full 2.5 seconds channel duration)”.

Kayle – changed

Divine Ascent (Passive):
Per stack attack speed changed to [30% + 10% per 100 AP at 5 stacks] from [6% (30% at 5 stacks)]

Senna – changed

Attack speed ratio increased to .32 from .2 Attack speed per level decreased to 2.5% from 4%
Absolution (Passive):
Crit damage reduction decreased to [14% (150% damage crits)] from [35% (130% damage crits)]
Per 20 souls crit chance decreased to 10% from 15%
Conversion of excess crit to lifesteal changed to 20% (+3% per 100 AP) from a flat 20%
Dawning Shadow (R):
Damage AP ratio increased to 80% from 50%

Tryndamere – changed

Battle Fury (Passive):
“Crit chance per point of fury” changed to 0.3-0.6 from 0.35-0.5

Viktor – changed

Glorious Evolution (Passive):
Removed! Viktor doesn’t now start with Hexcore in his inventory, and he can’t purchase upgrades
New! “Viktor gains an Evolution point when he completes a Mythic or Legendary tier item” (“Each Each evolution point upgrades a spell and grants +10% Total AP permanently”)
Death Ray (E):
Mana cost decreased to 50/60/70/80/90 from 70/80/90/100/110
Laser AP ratio increased to 70% from 60%
Aftershock AP ratio decreased to 60% from 70%
New! Augment – Aftershock now also says: “Aftershock deals 50% damage to minions and monsters”
Siphon Power (Q):
Augment – Turbocharge shield boost decreased to 50% from 60%
Gravity Field (W):
Ability’s slow effect increased to 30/35/40/45/50% from 30/34/38/42/45%
Chaos Storm (R):
Radius of storm increased to 350 from 325
Storm’s minimum speed increased to 225 from 200
Augment – Perfect Storm speed decreased to 15% from 25%

Volibear – changed

The Relentless Storm (Passive):
Attack speed has now got a 4% per 100 AP ratio per stack
Thundering Smash (Q):
Movespeed now gets a 3% per 100 AP ratio (which is doubled towards Champions)
Sky Splitter (E):
Cooldown decreased to 15/14/13/12/11 from a flat 15
The damage cap against minions and monsters has changed to [150/300/450/600/750] from [150/250/350/450/550]

Yone – changed

Way of the Hunter (Passive):
Chance of a bonus crit strike increased to 150% from 100% Damage reduction from crit strike increased to 15% from 10%


(“To compensate for changes to Tear and the removal of mana on Sheen in Preseason”, as detailed by Browning on Twitter here and also here)

Anivia – buffed

Flash Frost (Q):
Mana cost decreased to 60/70/80/90/100 from 80/90/100/110/120
Glacial Storm (R):
Mana cost decreased to 60 (+40/50/60 per second) from 75 (+40/50/60 per second)

Cassiopeia – buffed

Twin Fang (E):
Mana cost decreased to 50/45/40/35/30 from a flat 50

Corki – changed

Base mana decreased to 350 from 350.16
Mana per level increased to 54 from 34

Ekko – buffed

Mana increased to 330 from 250
Mana regeneration increased to 8 from 7

Evelynn – changed

Base mana decreased to 315 from 316.6
MP5 increased to 8.11 from 8.108

Fizz – buffed

Base mana increased to 400 from 317.2
Mana regeneration increased to 7 from 6

Gangplank – changed

Base mana decreased to 280 from 282
Mana per level increased to 60 from 40

Nidalee – changed

Base mana decreased to 295 from 295.6

Olaf – changed

MP5 decreased to 7.465 from 7.466

Skarner – changed

Mana per level increased to 60 from 40
MP5 decreased to 7.2 from 7.206

Sylas – buffed

Base mana increased to 350 from 280

The following Champions have had their Mana per level adjusted up by 20 each, as the dev explains on Twitter. This means the new values are as follows:

  • Camille – was 32, now 52
  • Darius – was 37.5, now 57.5
  • Fiora – was 40, now 60
  • Hecarim – was 40, now 60
  • Irelia – was 30 , now 50
  • Jax – was 32, now 52
  • Nasus – was 42, now 62
  • Twisted Fate – was 19, now 29
  • Udyr – was 30, now 50
  • Vi – was 45, now 65
  • Volibear – was 50, now 70
  • Wukong – was 45, now 65
  • Xin Zhao – was 35, now 75
  • Yorick – was 40, now 60
  • Zilean – was 30, now 45

Rune Changes


Cooldown Reduction
Runes’ CDR stats have changed to “+8 Ability Haste” in the game

Ravenous Hunter (D4)

Effect changed!
“Heal for a percentage of the damage dealt. Healing: 1% + 2% per Bounty Hunter stack. Bounty Hunter stacks are earned the first time you get a takedown on each enemy champion. Healing reduced to one third against non-champions.”

Conqueror (Precision Keystone)

Adaptive Force per stack increased to 2-5 from 1.7-4.2 Heal effect decreased to 10% from 15% Ranged heal effect decreased to 6% from 8%

Presence of Mind (P2)

New effect!
“Damaging an enemy champion increases your mana regeneration by 1.5-11 (80% for ranged) mana per second for 4 seconds. All energy users gain 1.5 energy per second, instead. Takedowns restore 15% of your maximum mana or energy.”

NEW RUNE: Legend: Destroyer (P3)

“Gain 2% Bonus Armor and Bonus Magic Penetration for every Legend stack (max 10 stacks). Earn progress toward Legend stacks for every champion takedown, epic monster takedown, large monster kill, and minion kill.”

Legends: Bloodline (P3)

Max stacks decreased to 15 from 20

Transcendence (S3):

New effect!
“Gain bonuses upon reaching the following levels: Level 5: +5 Ability Haste Level 8: +5 Ability Haste Level 11: On Champion takedown, reduce the remaining cooldown of basic abilities by 20%.”

Cosmic Insight (I4)

Effects changed:
“+15 Summoner Spell Haste +10 Item Haste”

Preseason Item Changes

The list of Preseason item changes is colossal, so we’ve linked to Riot’s full rundown all the Mythic and Legendary item changes for you to delve into right here (the post also has the deets on which items are new and removed).

“We’re about to debut on PBE for an extended six-week testing period,” Riot says in the post, “and want to share a preview of the 22 new Mythic items you can look forward to this November, plus a few dozen new and updated Legendary items. This isn’t a complete picture of all the item update has to offer, but we wanted to focus our first look on the splashiest item tiers.

“Housekeeping note: Things will be in a pretty early state when you first see them, but expect changes to things like icons, item and effect names, visual and sound effects, stat values, and more as we polish everything up over our month and a half of PBE time! Barring massive table-flips like item additions, removals, or reworks, though, this preview page won’t be updated after publishing. The item system will be immensely changed in preseason, and documenting our fine-tuning to that overhaul before it’s live won’t actually help players understand what to do on day 1. When the patch notes come out, they’ll have all the details as usual.”


Here’s all you need to know about the League of Legends Item Shop update on the way, and up for a big ol’ round o’ testing – you know where to click.

League of Legends patch 10.21 Champion Skins

Champion Skins


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Here’s the PUMPKIN PRINCE AMUMU splash art:


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Here’s the BEWITCHING ELISE splash art:

Little Devil Fizz – 1350 RP

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Here’s the LITTLE DEVIL FIZZ splash art:


“Engrossed in his work to the point of near-obsession, Kassadin vanished for some time into the bowels of his labyrinthian workshop, disappearing from public life for years. When he emerged, he revealed a shocking hextech innovation to the world: his own body, fully integrated with the technology he so loved.”

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Here’s the HEXTECH KASSADIN splash art:


“Aatrox is a violent and notorious crime lord whose name is feared throughout the criminal underworld. He is also disfigured by Ora abuse. Seeking to purge the substance from his body, he abducts Templars to extract it… and kills them when they are unable to do so. He has seized a number of high ranking Templar priests in order to draw out Karma, who he believes will finally heal him.”

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Here’s the ODYSSEY AATROX splash art:

Odyssey Karma

“A High Priestess of the Templar Order, Karma has hired a group of offworld mercenaries to free a number of captured templars from the grip of Aatrox, an infamous and powerful crime lord. She has taken a more interventionist stance towards the rest of the universe following the loss and transformation of her former lover, Zed.”

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There’s the ODYSSEY KARMA splash art:


“A member of an elite bounty hunting organization, Kha’zix is cold, ruthless and always gets the job done. Though hired by Karma to track down the missing templars, she doesn’t realize that Kha’zix is a double agent secretly working for Aatrox to bring Karma to him.”

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Here’s the ODYSSEY KHA’ZIX splash art:


“Sivir runs her own small bounty hunting operation on the fringes of the galaxy. She’s self-made and tough, having lost her parents to the Demaxian empire many years prior, but holds on to her soft and sympathetic side despite that hardened exterior. Sivir was hired by Karma, along with the other mercs, to free the captured templars.”

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Here’s the ODYSSEY SIVIR splash art:


“A space smuggler erroneously known for discretion, as well as his impractically famous ship, The Wildcard, Twisted Fate was hired by Karma to free some templars from some space pirates. He has only just begun to notice that the other mercs on the job are better known for wetwork than simple heists…”

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Here’s the ODYSSEY TWISTED FATE splash art:


Your Shop has returned to the PBE! This is a feature that periodically pops up in-game, offering some sweet deals on Champion skins, based on your match history over a given period of time. You can read more about Your Shop here.
Plus, PBE level restrictions have been temporarily removed from League’s PBE – here are the deets:

Info: PBE Level Restrictions Removed from r/LeaguePBE

Here are the top three things Riot’s focusing on for preseason PBE testing:

Seraphine, The Starry-Eyed Songstress

Seraphine hits the PBE on October 13 for her own round of testing! At that point, we’ll update these notes with all you need to know, but until then, check out this post giving a rundown of League of Legends’ Seraphine abilities and a bit about her backstory and special Ultimate skin.

WHEW! That’s all we’ve got for the impending League of Legends patch 10.21 notes, and all those item and shop changes headed to the game, right now, but keep checking back on this page over the coming weeks to keep up with all the latest changes up for testing – we’ll report on all the goodies and tweaks piping hot from the PBE.

Also make sure you go catch up on the LoL patch 10.20 notes if you want to stay up-to-date on what’s hitting the live game right now. Plus, we have a LoL tier list which has all you need to know about the best League of Legends Champions to play in each role if you’re looking for some tips.