Portuguese progressive metal band Apotheus release their new single 'Key Keeper' today. It's taken from their fourth studio album The Complex Permutation (out 20th November 2026), which revolves around an intriguing Sci-Fi story written by the band.
Watch the official music video for ‘Key Keeper’ BELOW!
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‘Key Keeper’ expresses an insatiable yearning consuming oneself. Propulsive drumming carries through the verses and build up to dense soundwalls with strong riffing in the chorus, while the passionate vocals by Miguel Andrade bring life to the lyrics that describe the painful process of losing a loved one.
Apotheus about their new single:
“Sometimes holding the key doesn’t mean you should open the door. 'Key Keeper' is about carrying the power to change everything, while realizing that the hardest decision may be to leave everything exactly as it is.”
Apotheus, known as a rising force of the European prog scene, played notable festivals like ProgPower Europe, Al Metal Fest, Comendatio Music Fest, River Stone and Laurus Nobilis Music Fest, where they’ve shared stages with the most respected names of the scene like Katatonia, Caligula’s Horse, Omnium Gatherum, Saor and many more. Furthermore they’ve opened stages for notable acts like Pain of Salvation and Gaerea in December 2025 and played their own European headliner tour in 2025.
Their newest opus is more than an album as it withholds a conceptual science fiction story written by the band, which will be released separately in text and audio format. Set deep into outer space the unified entity GODS confronts the ancient being VOID, which seeks to eradicate all life in order to end suffering. What follows is a cosmic conflict revolving around topics like individuality, free will, hope and life itself. Combining captivating progressive metal with a science fiction story has become the trademark of Apotheus’ musical work as with their earlier albums The Far Star and Ergo Atlas also are based on science fiction stories.
With The Complex Permutation the quartet from Portugal elevate time and space and open new dimensions of progressive metal. Top-tier songwriting combined with technical precision, driving rhythms, cinematic story telling and space-like atmospheres keep the listener captivated through the album showcasing an impressive variety inviting listeners to lose themselves in its expansive soundscapes. The Complex Permutation was recorded and mixed by Jorge Lopes at Redboxstudio, while Tesseract’s mastermind Acle Khaney was responsible for the mastering.
Apotheus are about to release a mesmerizing album full of emotion, atmosphere and virtuosic musicianship proving they are just about to ascend in the higher ranks of the progressive metal scene.
2. V.O.I.D.
3. Fracture
4. Key Keeper
5. 5th Dimension
6. Ascension
7. The Wait
8. The Complex Permutation
9. A New Beginning II
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