In Fire Emblem Three Houses, Abraxas is the name of a damage-dealing Faith spell.

Using the "Horn of Abraxas", Swan summons the Black Skulls, a trio of demonic bikers addicted to a highly potent form of LSD, and along with the Skulls, the Children invade Red and Mandy's cabin, tying Red up in barbed wire outside, and leaving him for dead. The camera shows his face merging with Mandy's showing his lack of respect for boundaries and his narcissistic inability to see others as separate from himself. The being known as Abraxas has been worshiped or feared among many cultures throughout history. The horn is clearly phallic and completely in line with an interpretation of Abraxas as a demigod at least partially responsible for the creation of everything. It is used in the film by Brother Swan to summon the demonic biker gang known as the Black Skulls. In the 2018 thriller Mandy, starring Nicolas Cage, the "horn of Abraxas" is a sort of stone flute with magical properties. When Jeremiah initially sees Mandy (Andrea Riseborough) in a blue and red haze, he demands the possession of her. At his command, one of his henchmen summons a group of demonic bikers known as the Black Skulls by blowing the “Horn of Abraxas” (an occult name) and offering them the blood of a human sacrifice. At some point, the Chemist was captured by the Children of the New Dawn, a hippie cult led by Jeremiah Sand, and he supplied them with the Horn of Abraxas, an apparently magical horn that can summon the Black Skulls to do the wielder's bidding. In Panos Cosmatos' Mandy (2018), Abraxas is… The Shadow Mountains, 1983. The being known as Abraxas has been worshiped or feared among many cultures throughout history. You already know if you’ll enjoy a film where LSD-crazed leather daddies are summoned via something called the Horn Of Abraxas. A no-holds-barred ride into madness … He entrusts his most loyal follower with the horn of Abraxas and sends him off to get her. Note: Contains major Mandy spoilers.
The “Mandy” score was one of the last composed by Icelander Johann Johannsson (“Arrival”). According to Professor Geller, Abraxas originated from the Greek and later on adopted by the Catholic Church.

Using the "Horn of Abraxas", Swan summons the Black Skulls, a trio of demonic bikers addicted to a highly potent form of LSD, and along with the Skulls, the Children invade Red and Mandy's cabin, tying Red up in barbed wire outside, and leaving him for dead. There is also a fair amount of research about the existence of reality as constructed under the rule of Abraxas. Enter Mandy and the Horn of Abraxas.
Calling his second in command Brother Swan, Jeremiah gives him the Horns of Abraxas. Red and Mandy lead a loving and peaceful existence; but when their pine-scented haven is savagely destroyed, Red is catapulted into a phantasmagoric journey filled with bloody vengeance and laced with fire. The horn seems to have some sort of a weird power and a group of bikers resembling a horde of demons. Using a strange stone flute called the 'Horn of Abraxas', Swan summons the Black Skulls, a demonic-looking biker gang with more than a passing resemblance to Hellraiser 's Cenobites. But on the other hand, the gang seem to be summoned from nowhere by the Horn of Abraxas (a name with … Bring me the horn of Abraxas. It turns out that he is the leader (played by Linus Roache) of a weird cult and tells his followers to get Mandy for him. As an archon, as god, as a demon - each manifestation has displayed similarities owing to a common origin in the distant past of Near East mythology. The bikers arrive after the Horn is blown, sure, but they speak a single language. Their tongues are rancid with the word of death. Mandy, though, is flat-out orders of magnitude a more emotionally adept and shockingly powerful film in virtually every department, from the dazzlingly insane cinematography and lysergically–inclined production design to what I can only believe is Nicolas Cage’s single best performance to date. This demonic biker gang are summoned by the cult via a mystical flute called the Horn of Abraxas, and they set about kidnapping Mandy from her devoted husband Red. The Black Skulls kidnap Red and Mandy and bring them to the cult’s secret lair. Jung also wrote this concerning Abraxas: “He is the bright light of day and the deepest night of madness...” Only one character in Mandy …