Overview
We’re going to give you a quick rundown of key points from the latest patch. You can also see how these changes have affected the meta by looking at our Champion Statistics page, which highlights changes in Win Rate between patches.
25.13 is the official MSI patch and serves as the beginning of Act 2! The big update for this patch are the ARAM updates, which includes adding two new maps to the ARAM rotation. Arena also makes a triumphant return this patch and will stick around for the whole year.
For a full breakdown of exactly what has been changed, check out Riot’s official patch notes here.

Aram

Koeshin's Crossing is the newest map to hit the ARAM rotation and will be joined by Howling Abyss (the normal version) and the return of Butcher's Bridge
Map is decided randomly at the loading screen
Champion Cards are replacing rerolls -- pick between two (sometimes three) options and toss the other to the bench, which you can also trade with
Champions
Buffs
Fiddlesticks (W damage increased.)
Gangplank (W mana cost decreased. R cooldown decreased.)
Irelia (Passive attack speed increased at lower levels.)
Kindred (R cooldown decreased at lower ranks.)
Nidalee (Q damage increase based on range increased.)
Rammus (Health Growth increased. W Armor/Magic Resist increased.)
Nerfs
Ryze (W damage decreased, and mana cost adjusted.)
Twisted Fate (R cooldown increased.)
Vi (Passive shield decreased.)
Yorick (Base Armor decreased.)
Changed
Briar (W attacks can no longer be canceled. E cast time reduced.)