Patch 26.11 notes for League of Legends are here. (Source)
Patch Highlights

Role Quest Adjustments
Support Adjustments
First off, we have a straight buff to Grubs. In line with 26.9’s changes to role quests to open up some amount of roaming and laning flexibility back into the laning phase, we are also buffing Grubs as a destination to roam to for supports.

Summon Aery
Summon Aery’s early game defensive output is being tapped down a bit so lane trades can stick onto enchanter duos a bit better.

Aftershock
We’re buffing Aftershock’s early game output a bit so aggressive users can better trade with their opponents.

Guardian
And finally, we are buffing Guardian’s cooldown and adjusting how it scales to help tankier users who need it to survive the laning phase.

Dream Maker
As a pretty "behind the scenes" unique that most of us just expect to work, Dream Maker is getting a mix of adjustments to help it perform in a more generally functional way that should pan out to be a nerf in most situations, but will definitely be a buff in others.
Blue Bubble Damage Reduction is being adjusted from only affecting the literal first instance of damage (i.e. the first tick of a DoT, or the first instance of an on-hit damage from an incoming basic attack) to affecting the first cast source (i.e. the entire DoT, until it runs out of flat damage reduction.)
Purple Bubble Damage is changing from mostly an on-hit effect to an on-hit or on-ability damage cast source effect with AoE penalties. (i.e. If Ezreal Ult triggers the Purple Bubble, it will apply to that entire Ezreal Ult but with reduced AoE efficacy. See Nami E for a similar example.)

Moonstone Renewer
Moonstone will no longer double dip in both heal / shield power and Grievous Wounds / Shield Reaver. This is mostly a nerf, but will occasionally be a net positive when opponents have Grievous Wounds / Shield Reaver.
As a mathy example, this means that if you have 50% Heal / Shield Power, and heal one ally for 100 * 150% from Heal / Shield = 150, on 26.10 it would then bounce 150 * 30% * 150% = 67.5 healing to another ally, whereas now it will only bounce 150 * 30% = 45 healing.

Imperial Mandate
An item that was completely bound to Nami because of outsized synergy with her E, Mandate is getting reworked to better fit into a niche for utility casters who want to help their team out with more crowd control rather than healing/shielding or personal damage. We look forward to seeing you figure out new optimal users!

Echoes of Helia
A straightforward nerf for enchanters.

Locket of the Iron Solari
And a straightforwards buff for tanks.

Knight’s Vow
For Knight’s Vow, we’re pushing the unique effect rather than generically buffing its stats or gold cost.

Zeke’s Convergence
Zeke’s is getting a QoL improvement for any users who might be casting their ultimate from long range—such as Leona and Nautilus.
Champions

W – Pale Cascade

Passive – Z-Drive Resonance
Heimerdinger
See Highest Win Rate Heimerdinger BuildsAdditionally, it was brought to our attention that his Evolution Turrets sometimes fail to follow up on his Storm Grenade when they lose vision of the target too quickly due to minor timing fluctuations around vision and turret logic, so we are increasing the vision duration slightly to resolve that.

Q – H-28 G Evolution Turret

E – CH-2 Electron Storm Grenade
Kassadin
See Highest Win Rate Kassadin Builds
Q – Null Sphere

W – Nether Blade

Passive – Harrier

Q – Blinding Assault
Included in these changes are a continuation of the latest nerf’s push towards bringing him back into primarily critical strike builds rather than just Essence Reaver into bruiser, which we think can sit stronger since at the end of the day, a squishier Smolder has more weaknesses to play around, like being burst by enemy spell rotations.
Passive – Dragon Practice

E – Toxic Shot
Xin Zhao
See Highest Win Rate Xin Zhao Builds












