Black Onyx stared into this abyss and sealed a left-hand pact with Phoros to rot the alchemy upon the philosophical stone. These fumes wrecked the pillars of time and procreated a vicious ensemble of smothering tunes towards ruin baptized under the moniker CHAPEL OF SAMHAIN.
Totally architect in a monolithic vision and crafted in the sulphuric womb of lunacy both musicians accepted this challenge outside their other musical projects (Grog, Velório & Nethermancy) to embrace and celebrate the newborn spirits of the dead.
Wandering through the extreme and obscure catacombs of the old school metal scripts, traces of Death, Black with eerie symphonies gather for a mass of skull crushing hymns along with a choir of morbid enchantments that turn down the crosses for the CHAPEL OF SAMHAIN hordes as the ambiences grow thicker within the abyssic layers of Doom.
Once entering Black Onyx Cave, an altar will rise as you will feel the mark and the creation force behind this unparalleled vortex meant to represent the seasons change within light and shadow as Man grows wither into His Mastery. Transmutation is the Key!
FFO early Morgoth, Profanatica, Acheron, Imprecation... 
Listen: https://nuclearwinterrecords.bandcamp.com/album/black-onyx-cave