The meeting of Raison d'être, the industrial ambient brainchild of Swedish sound maker Peter Andersson named after a thought by Carl Gustav Jung - a major source of inspiration for the mental and introspective journeys that its listening could inspire -, and Troum, the well-known project by Bremen-based duo of drone architects Stefan "Baraka(H)" Knappe and Martin "Glit[S]ch" Gitschel that according to many listeners could be considered as the proper follow-up of their previous brainchild Maeror Tri, is one of those rare events, which can only deliver heady efflorescences and this sonic blossoming is so well accomplished that "De Aeris In Sublunaria Influxu", which required four years of making, has the potential to be considered the proper masterpiece of respective discographies. The opening "Folia" could let you imagine they get closer to the shamanic nuances of more ritual-oriented relics of the genre, but the dynamics of the following long-lasting suite "Alio Tempore", where the slow repetition of highly reverberating bell and a very low thundering frequency got gradually submerged in an ecstatic overflowing pad-synth, which fills the sonic space, pushes listeners towards cosmic primeval wanderings by a planing organization of sound, whose "cath/ar(c)tic" effect seems to get reprised in the shortest delight provided on "Flammae", which follows the mystical heart of the release, the almost 40 minutes listening offered by the triptych of "Oculum Mundi" - sounding like the sonic mirroring of the boiling primordial ooze, getting electrified by some superior being for the creation of some universe -, "Atmosphaera" - the harmoniously confused amalgam of shining and gliding elements that seems to give a voice to the admirable miracle of creation - and "Meditationum", whose 20 minutes of dilating harmonies evoke the making of each (known and unknown) physicochemical state, and precedes the final "Ad Infinitum", which cannot be considered a proper final act, but rather the necessary junction of a looping cycle which doesn't really have an ending moment...