One nerfed LoL champion has the second-highest win rate in high ranks in Patch 13.5 - Dot Esports

How the tables have turned.

How much does it cost to buy every champion in League of Legends? - Quora

League of Legends patch 13.3 preview: K'Sante nerfs, LeBlanc buffs, Tenacity adjustments, and more

League of Legends patch 13.5 notes: Full list of new champion prices, Yuumi rework, jungle nerfs & more - Dexerto

League of Legends Patch 13.22 Focuses on Mage, Champion Balance - Esports Illustrated

LoL Patch 13.19 Early Notes: Champion Buffs and Nerfs

Highest Win Rate Champions in Patch 10.5

Highest Win Rate Champions in LoL Patch 12.14

The biggest winners and losers of League of Legends Patch 13.13 - Dot Esports

Patch 13.11 notes

A snapshot from each season to compare champs that had highest WR, ban rate and popularity and also the general state of the game [Average Duration, Blue vs Red WR, etc.].

Patch 13.5 notes

Patch 13.5 notes

Highest Win Rate Champions in LoL Patch 12.14