One aspect I particularly appreciate is the use of musical breaks. These pauses allow other instruments to shine, such as pianos, choir-style vocals, synths, and drums, showcasing the songs in their truest form. This approach leaves room for musical exploration. For example, in "Despondent" at the 2-minute mark, the main song recedes, letting harmonies build up with synths in a warm and comforting way. The drums provide a slow but strong backbone, and when the vocals return, the violin-styled synths create an epic yet sorrowful feeling. These moments highlight Exitium Sui's brilliance.

The use of guest vocalists, such as Riccardo Furlan on "Abysmal" and Nick Magur on "Escape," adds depth to the already rich compositions. Many tracks start with a sorrowful piano segment that transitions into the song, layered with drums, synths, and violins, evoking feelings of sadness, wonder, awe, and longing. It's rare to find bands that can evoke such emotions in an album. "Endless/Regression" is one of those albums you can appreciate no matter your mood. You can delve into the musicianship and the intricate layers of sound, but it also works perfectly as background music for a gathering with friends, fitting even a Dungeons & Dragons session. The album feels like an epic dream or adventure, shifting from sadness and longing to uplifting and motivating.

The vocal style remains consistent throughout the album, which is entirely fitting. Chris Gebauer has perfected his sound from start to finish, with classic deep doom vocals that complement the atmospheric parts, adding depth to each song. The deep, resonant vocals enhance the atmospheric qualities of doom metal, blending seamlessly with the heavy, slow-paced instrumentation.