As a subject matter expert in the realm of fictional universes, particularly the Marvel Cinematic Universe (MCU), I can provide an answer regarding the concept of an "Infinity Stone." However, it's important to note that within the official MCU, there is no "Soul Infinity Stone." The MCU features six Infinity Stones: Space, Mind, Reality, Power, Time, and Soul. Each stone possesses unique powers and when combined in the Infinity Gauntlet, grants near-omnipotent power to its wielder.

The Soul Stone is one of the most enigmatic of the six. It has the ability to manipulate life and death, to separate or control the soul from the body, and to see into the souls of others. The Soul Stone was introduced in the MCU in "Avengers: Infinity War" and is located on the planet Vormir.

To summarize, while the concept of an Infinity Stone is well-established, the "Soul Infinity Stone" as a distinct term does not exist within the official MCU narrative. The Soul Stone is one of the six original Infinity Stones and is known for its control over souls.

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Allows the user to steal, control, manipulate, and alter living and dead souls. The Soul Gem is also the gateway to an idyllic pocket universe. At full potential, the Soul Gem grants the user control over all life in the universe.read more >>