League of Legends Patch 12.19: Champion Nerfs on Master Yi and Rek'Sai
Master Yi got nerfed Mid-patch 12.5 just after his On-hit attacks change - Not A Gamer
Master Yi win rate drops after nerfs in League of Legends Patch 12.5 hotfix
Yi rebalancing this upcoming patch to nerf Q AD and crit scaling... but don't rejoice yet, because he might still be able to abuse the Duskblade passive with a different build :
Riot Dev Says Master Yi Nerfs Imminent After His Win Rates Soar
Patch 12.5: Nerfs für Master Yi und Hullbreaker - Seraphine-Buffs | Summoners-Inn.de
League of Legends patch 12.5b notes: Master Yi buffs, Zeri & Jinx nerfs - Dexerto