Mired in the mediaeval mysticism of raw black metal tyrants, Silent Thunder and Zmyrna, Saeculum Mysticum is a split incantation of cruellest conspiracy. Descending from the heretical heavens in the age of 2021, Silent Thunder is the American blitz bulwark of M., infamous for his sorceries under the Lamp of Murmuur moniker, but here utilises Silent Thunder to bring thunderbolts of solitude upon his enemies with his work on Saeculum Mysticum providing a raw symphonic black metal attack of; synth laden somnolence, melancholic guitar necromancy, orthodox percussive torture, snarling vocal lamentations and a production that is both equal in its clarity as it is in its dissonant dirge. Zmyrna clawed its way from the grave in the age of 2020, a three piece formed from across Czechia and Slovakia, who provide a trinity of raw black metal spells for Saeculum Mysticum. Equal to the heights of heresy Silent Thunder foreshadows, Zmyrna bring a crushing crawl of raw black misery down upon those it preaches its blasphemies upon, providing a wretched host of; howling wolven oration, droning choral vocals, dedicated mediaeval thematics, frostbitten tremolo melodics, windswept flute weariness, martial beat percussion and a truly dissonant production of eldritch entropy. Whispered in hidden chambers of funerary smoke, Saeculum Mysticum is the perfect meeting of covens separated by the vast oceans, a visceral exploration of the enigmatic past and a fulmination of both entities greatest works to date. A split incantation of raw black metal mediaeval torment not to be missed.