The Aur She-Ain Bo Machshavah in its fully separated form as manifested on the Other Side of the Tehiru where it actively opposed the Aur She-Yesh Bo Machshavah assumed the Adversarial Cause and the role of the Antithetical Twin of the God of Cosmic Creation and became the essential opposite of that Thoughtful Brother who by his restrictive instincts necessitated the assumption of constraining forms in order to counteract his afflicting impulses of separation and limitation.
This indirect coercing of the Thoughtless Light, through its deepened separation from the Ain by the propagation of the Limit and its confinement to the lower Tehiru Void, provoked it to consciously combat the Thoughtfully Spawned Creation and thus the work of the Creator God resulted in the condensation of the Formless Black Light into the Spirit of the Other God.
The Other God is the Thoughtless Antithesis that has assumed all thoughts of Anti-Cosmic Opposition and is therefore connected to the name HVHY, which is the mirroring reversal of the YHVH, but more importance than being just mere names the YHVH and HVHY are descriptions of the directed will behind each impulse, for as the YHVH through his emanations of the four letters of his name spawned his creation from the Atziluth down to Assiah, making the Spirit dilute and descent into Matter, the Other God through the formula of the HVHY seeks to undo creation be elevating the Spirit from the Clay of Matter through the reversal of the emanations of each of the four letters and lead the Fallen Essence back into the Fires of Atziluth and from there cause the cosmic Yod to assume its Primal Unmanifest Aspect and step back towards and beyond its station of the First Thoughtful Impulse by being consumed by the Thoughtlessness of his Twin and forced to return into the undifferentiated Ain.
The Other God has therefore within some of the Qabbalistic traditions been named as the HVHY, which is assumed by those opposing That God to be the true name of the Devil, but as already explained these two forms of the Tetragrammaton are more descriptions of modes of the emanating and unfolding of the divine impulses than actual names, this is specially true when it comes to the Other God who was forced out of necessity to assume his cause of reversal.
This Other God is also represented by the title El, again mirroring his opposed Thoughtful Twin who is the one most commonly associated with that title within the Qabbalistic traditions, signifying within this Qliphothic context the Primal Might of the Thoughtless Light manifested within and emanating from the Sitra Achra and when employed as an ending to the names of the Dragons and Serpents of That Side it does not signify them being under the control of, or attached to, YHVH, but does instead emphasize either their opposition towards the cosmic creator or their direct links to the HVHY, all depending on the context and the exact meaning of their names, this because the side of Thoughtlessness is sovereign and governed by its own divine hierarchy and is in no way controlled by the side of El to which they only bring Wrathful Chaos and Dissolution.
The El of the Qliphoth is more specifically called the El Acher, meaning plainly Another or the Other God, and is often referred to as the Alien, Strange or Foreign El, in order to stress the distinction between this El and the cosmic creator, and this is the esoteric meaning behind the Demiurge YHVH’s commandment in Exodus 34:14 stating Thou shalt worship no Other God; for the Lord, whose name is Jealous, is a jealous God, this because the Other God referred to is the Thoughtless God of the Other Side, being the El or the Elevenfold Elohim Acherim opposing his own cosmic rule and power.
While being of practical use and in themselves revealing to a certain degree, if approached and applied from the correct perspective, all the mentioned attempts at naming the Devil opposed to the creator remain as nothing more than exoteric titles of Divinity, without being in depth linked to the veiled mysteries of the Other God.
*excerpts from The Sitra Achra