What are the limits of Sihr? Is soul manipulation (stealing, splitting, or 'Horcruxes') possible in Islam?

I am trying to understand the absolute limits of magic (Sihr) and the power of Shayatin (devils) from a strict Islamic Aqidah (creed) perspective. In various non-Islamic folklore and modern fantasy, magic is often depicted as being able to manipulate the human soul (rūḥ) to achieve great power or immortality. I want to know if any of these concepts are even remotely possible according to Islamic sources, or if they are entirely falsehoods. My question is divided into two parts: Part 1: Manipulating Other Souls This is the common "demonology" trope. Soul Stealing/Enslavement: Does a sāḥir (sorcerer) or a Shaytan have the power to "steal" a sinful corrupt human's soul, either from a living person or at the moment of death, preventing it from being taken by the Angel of Death and entering the Barzakh? Soul as Fuel: Is it possible to use a "stolen" soul as a sacrifice, a source of power, or "fuel" to power a Sihr ritual, or to sustain the sorcerer's/Jinn's own life force? Part 2: Manipulating One's Own Soul (The "Phylactery/Horcrux" Concept) This is the concept of a sorcerer trying to achieve personal, worldly immortality. Soul Splitting: Is it possible for a sāḥir, through Sihr, to "split" their own soul? External Storage: Is it possible to take a fragment of their soul and place it in an external, inanimate object (a stone, a ring, etc.) or even another living being? Achieving Immortality: If so, would this act as an "anchor" to the Dunya? Would it allow the sorcerer to cheat their fated time of death (ajal), so that even if their body were destroyed, they could not die because their soul fragment still existed in the object? In short, is the power of Sihr limited to this world—causing illusions, sickness, separation, and affecting the mind/body—or can it actually interfere with the divine rules governing the soul, death, and the Barzakh as set by Allah?