Unfortunately, there is a limit to how much Spiritual Energy a body can contain before it explodes with the spiritual power equivalent to a tactical nuke.
Spiritually awakened or not, lots of Souls are going to get vaporized in the explosion. Therefore, I stop pumping my Spiritual Energy into the corpse after half an hour or so.
There should be more than enough Spiritual Energy within the corpse to put to good use, and If I take possession of the corpse right now, I would instantly become one of the strongest if not the strongest human on Earth, at least at the moment.
But that doesn't really say much, for humanity is fairly weak compare to beings throughout the cosmos and beyond. This is because humanity main strength comes from their applications of Science instead of from within themselves.
That will have to change, as there are countless of worlds and places out there that the laws of physic have been altered or nullified completely, rendering any technology inoperable or useless. This is what is happening within the Zone, and that is only the behavior of electron has been altered.
It is not possible to win against magic and other kind of powers by relying on technology alone. People should stop rely on basically tools when they are capable of so much more.
Anyway, I use the rest of the hour to inscribe Runes all over the corpse, allowing me to channel magical power and cast spell once my spirit possess the corpse. It would be better if the corpse has a Magical Core, but that is only possible if the corpse still has a Soul.
While it is possible to create and implant Magical Core into corpses with the items currently available to me, I just do not have the time to do so. It might not even work since I have never attempted such a thing myself before.
Since there is no certainty, it is more or less a waste of time and resource to try.
And besides, if I have the time, I rather just awaken Vital Power within the corpse instead. Awakening Vital Power allows me to make the corpse nearly indestructible, and I do love to have an indestructible avatar of sort.
Next time then, I suppose, as there will always be a next time.
I send my consciousness into the corpse to take possession of it, and it takes me a moment to get use to the meatsuit. Once I did, I pull myself upright and eye my original body, resting there and seemingly asleep.
My real body will be safe here, at least until the next couple of hours, and I do not think I will actually need more than that, as I can feel incredible powers coursing through my new body. Without another consciousness within my body, there is absolutely no resistance whatsoever, allowing me to do I must without caring about the consequences.
And if the body breaks down, I can always repair it with my magic and spiritual power.
Speaking of which, I immediately sell myself to the Shop System, causing the connection to be severed instantly. I buy back a copy and instantly regain control of the copy.
Once some more tests are conducted to my satisfaction, I access the Inventory to dress myself as well as hiding my identity with a distinctive gasmask. After which, I wield Amaterasu and head out.