The doctoral composition concerned by this document is a contemporary oratorio of 95 minutes: it involves seven solo singers (two sopranos, a mezzo, two altos, a tenor and a bass), a polyphonic chamber choir (divided in three to sixteen parts) and an electroacoustic quartet of guitars and synthesisers. The title refers to the otherworldly guardians of the Jewish canon (Tanakh) and speculates on the energetic appearance of the Elohim, reflected by the timbral qualities of the electronic instruments. The narrative, built around four angelic characters (Seraphim) and a female earthling counterpart, outlines in seven movements a fictional cosmogony, and the evolution of human society overseen by astral mentors. The libretto has been written on purpose by the composer himself, mostly in Italian: some multi-linguistic fabrics blend poetry with Christian fragments in Greek and Latin.