The “Ultimate Spellbook” game mode is highly anticipated by the League of Legends community, and it’s one of the bigger highlights in the upcoming Sentinels of Light event.The new game mode will be out with League of Legends patch 11.14. It will allow players to do some really fun things as it introduces the Spellbook rune mechanic into the mode but for ultimates.Apart from their usual champions ultimates, League of Legends players will have access to a pool of 39 additional ultimates. However, the choice of ultimate they pick will be random.We're re-enabling Ultimate Spellbook on the PBE today!Here's the changes since last week. :) pic.twitter.com/RXUqTVXOoL— Reina Sweet (@ReinaSweet) June 23, 2021The game mode will be coming with the Ruination theme as well, and Summoner’s Rift will be shrouded in black fog to celebrate the Sentinels of Light event.The League of Legends devs are looking to bring in a lot of tweaks to the game mode in the PBE to help smoothen it out and polish it further.Here is the list of changes to the League of Legends PBE as mentioned by Summoner@20.League of Legends Ultimate Spellbook game mode changes in PBENo bans for this release, at a minimum. Bans tend to detract more than they add for temporary modes since so many people play to just to get an opportunity to try out their main champ with the big cool fun thing.We may revisit in the future, but never for brand new modes.— Reina Sweet (@ReinaSweet) June 24, 2021NewNew! Lulu R is now available as an Ulternate SummonerNew! Dragon UI: The new dragon now has its own unique icons and working tooltipsTeleport is reenabledThere’s now a reminder at the start of the game if you forget to spend a large chunk of your goldLeague of Legends Ultimate Spellbook Bug FixesBugfix: Dragon Soul. Various, including fixing “perma revive” and “perma death”Bugfix: The proper summoner spells will now be correctly assigned in champion selectBugfix: Mordekaiser R + Lux R will no longer permanently disable various kinds of auto attacksBugfix: Maokai R no longer sets both summoners to cooldown in some circumstancesBugfix: Xerath R on certain champions no longer crashes the gameBugfix: Ulternate Summoner scaler modifications will properly visually persist through reconnect (this also fixes a similar Sylas visual bug)Bugfix: Ahri R’s Orb no longer sticks around forever after dashingBugfix: Numerous weird animation breaks and t-poses removedBugfix: Clarity is no longer on the mode; Cleanse is now on the modeBugfix: Tryndamere R now grants Shyvana and Renekton Fury (not yet on Rek’Sai, but soon)Bugfix: Queuing up an instant spell cast during a Mordekaiser R will no longer result in the queued cast being in the wrong dimension, e.g., Queuing Malphite’s Unstoppable Force during the cast of a Mordekaiser R will properly result in the Unstoppable Force being in the death realmBugfix: Mordekaiser R will no longer get cleansed by your own Olaf ultimate, and vice versaBugfix: Darius R and Kha’zix R no longer max Ezreal’s passive stacksBugfix (also a significant nerf): Ashe R no longer gets maximum stun duration no matter the rangeLeague of Legends Ultimate Spellbook BalanceSummoner Ult Buffs:Bard R: 35 Bonus Ability Haste → 45 Bonus Ability HasteJhin R: 80% Ratios → 90% RatiosZoe R: 35 Bonus Ability Haste → 45 Bonus Ability HasteSummoner Ult Nerfs:Amumu R: 80% Ratios → 60% RatiosCho’Gath R: 20 Bonus Ability Haste → 0 Bonus Ability HasteLissandra R: 20 Bonus Ability Haste → 10 Bonus Ability HasteOlaf R: 35 Bonus Ability Haste → 20 Bonus Ability HasteTryndamere R: 35 Bonus Ability Haste → 20 Bonus Ability HasteAshe R: Fixed stun duration (see bugfixes)League of Legends Ultimate Spellbook Other ChangesUnsealed Spellbook is disabledKayn R is temporarily disabled while we address some issues with it