After thinking it over, Vizet could sketch out the rough process:
Voldemort broke through the Fidelius Charm and forced his way into Harry's home, then cast the Killing Curse in succession to kill James and Lily;
The special thing about the Killing Curse was that it summoned a vortex symbolizing "death," and the main purpose of that vortex was to draw in the soul;
Because Voldemort had created multiple Horcruxes, his soul had become extremely unstable, and such an unstable soul caused him to be affected by that vortex symbolizing "death";
When Voldemort cast the Killing Curse, preparing to take Harry's life and let the vortex symbolizing "death" devour Harry's soul, Lily's "Love's Magic Protection" took effect;
"Love's Magic Protection" rebounded the Killing Curse and made it fall on Voldemort instead. Because Voldemort had created multiple Horcruxes, his soul could not truly be taken by the vortex symbolizing "death";
Even so, Voldemort still had to pay something, so the vortex symbolizing "death" tore at Voldemort's soul and split off a new Soul Fragment;
After Voldemort fled Harry's home in panic, the Soul Fragment, driven by life's most primal instinct, actively merged into Harry's scar, forming a strange symbiotic relationship;
This symbiotic relationship could also be explained by the "Dependence Connection Ritual"—Voldemort had become Harry's "arm holding the Wand";
Through this relationship, Harry could use Voldemort's Soul Fragment and the abilities within Voldemort's Soul Fragment—in other words, Parseltongue.
After figuring out this process, Vizet realized a very serious problem:
Although Voldemort had not followed the Horcrux-making procedure to turn Harry into a Horcrux, judging by the "similarity" and "contact" of Sympathetic Magic, Harry could actually already be considered a Horcrux;
It was just that so far, Voldemort did not seem to have realized this, and so he had not used