This idea come after chat Reddfoxx99, what if Rainbow of Darkness and Rainbow of Light are sentien? So drew what Rainbow of Darkness would like if have body and when he open mouth his tongue have similar to Venom from Spider Man comic. He exists before universe born ( or bing bang ) before his sister Rainbow of Light born. Design and colours are inspired by Dharkon from Super Smash Bros Ultimate, Dark Gaia from Sonic games and Eternatus from pokemon.