The series of artists you mentioned——primarily collaborated on the 2022 album titled ЧЕРЕН ПЕТЪК (Black Friday). These artists are prominent figures in the Bulgarian trap and hip-hop scene, often associated with the Murda Boyz collective.
The "long piece" likely refers to one of their major collaborative tracks or the album itself, which features several high-energy songs with multiple contributors: bobo_armani_x_niki_kotich_x_pameca_x_kickdown_x...
: The most notable collaboration featuring all the artists you listed, plus SST and Nasyo Chernia . The Official Music Video was released in late December 2022. The Official Music Video was released in late December 2022
: Features Bobo Armani, Nika (Niki Kotich), Kickdown, SST , and Pameca. AMNEZIA
AMNEZIA - song and lyrics by Bobo Armani, SST, Pameca, Kickdown | Spotify. AMNEZIA. Bobo Armani. ЧЕРЕН ПЕТЪК20223:11. Bobo Armani.
: Another significant track from the same album featuring Bobo Armani, SST, Niki Kotich, Pameca, and Kickdown.
You can find the full collection of these collaborations on streaming platforms like Spotify and Apple Music. AMNEZIA - song and lyrics by Bobo Armani, SST ... - Spotify