UnderWorld Online Wiki

Crystals is a Los Angeles–based producer known for his work with Destroy Lonely and Ken Carson. He contributed to major projects including Love Lasts Forever (2024) and the 2025 mixtape ᐸ/3³, with credits on tracks like “Kool On Ya,” “Open It Up,” and “Say That.” Crystals frequently collaborates with Clayco, co-producing songs such as “Say That” and working across the same projects for Destroy Lonely. As part of the Underworld Online, Crystals is one of the key producers shaping the sound behind the artists, contributing to the collective.

John M. Weir, known as 1velveteen, is a Seattle-based producer recognized for his work with Destroy Lonely. He is part of the group of producers contributing to the sound behind Destroy Lonely’s releases within the Opium scene. 1velveteen has co-produced multiple tracks, including “Raver” and “Pop a Tag,” working alongside Clayco and other collaborators. In addition to individual track credits, 1velveteen has contributed to full-length projects such as If Looks Could Kill (2023) and Love Lasts Forever (2024), where he is listed among the producers involved in shaping the overall sound of the albums. His production style combines melodic elements with heavy, distorted drums and electronic textures, contributing to the darker, atmospheric sound associated with Destroy Lonely’s music.

Exo is an emerging music producer carving out a distinct sonic lane with an ear for atmosphere and emotion. Known for his versatile production style, exo has built a growing roster of collaborations with some of the underground's most compelling voices, including Blxty, Diorsvsyou, Sk8star, Apollored1, and Dani Kiyoko. His work spans moody, textured soundscapes and hard-hitting beats that give artists the space to shine while leaving an unmistakable imprint. With each project, exo continues to sharpen his craft and expand his reach, cementing himself as a producer to watch.

Keian B, professionally known as Streo, is a producer recognized for his work within the Opium and underground rap scene. He is credited as a producer on “OPM BABI” from Playboi Carti’s 2025 album MUSIC, alongside Clayco and OpiumBaby. In addition to his work with Playboi Carti, Streo has production credits on tracks such as “ORCHESTRATË” and “Heavy Stunts” by Yeat, including collaborations with Don Toliver.