How do you get the PROJECT: Renekton Chroma Icon?
It was an event pass reward. Riot's description in the client reads: “This icon was acquired from the Event Pass Token Shop during the 2021 PROJECT event.”
Is the PROJECT: Renekton Chroma Icon still available?
No. Riot tied the PROJECT: Renekton Chroma Icon to 2021 (event pass), and it does not normally bring back past event rewards or bundles.
