How do you get the ARAM Clash 2022 Icon?
It was a mission or event reward. Riot's description in the client reads: “This icon was acquired by participating in the 2022 ARAM Clash Tournament.”
Is the ARAM Clash 2022 Icon still available?
No. Riot tied the ARAM Clash 2022 Icon to 2022 (mission reward), and it does not normally bring back past event rewards or bundles.
