Bobo_armani_x_niki_kotich_x_pameca_x_kickdown_x... -

: Another significant track from the same album featuring Bobo Armani, SST, Niki Kotich, Pameca, and Kickdown.

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 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. : Another significant track from the same album