I might be misunderstanding what you want but the only real difference would be is that it would be the entities energy in some form instead of yours, and you don’t want to do that, imo that’s just impure. I don’t think they’d just shove a block of energy in you either because you wouldn’t really get much out of it, you need to ensure energy is flowing and not stagnant.
It would be better if you worked with a universal energy source like the cosmos (which you can cultivate unlimited energy from), or if you used incantations to stimulate your own chakras and energy systems to raise energy. The easiest and strongest form of energy you can raise is sexual energy and there’s a lot of incantations for it, the bija mantra “Kroom” can help cultivate sexual energy especially if paired with breathwork (I would suggest Bhastrika) but you need to practice cycling the energy too and using it.
The more you cycle around and use the energy, the more you’ll be able to handle in future, so your various energy channels and centers will be able to handle larger amounts flowing through them. You definitely do not want the energy to be sitting stagnant without being used, that can cause a lot of issues. From personal experience cultivating is the easy part but actually managing and handling such a huge amount of energy is harder, for me it can feel like a nuke about to go off if I don’t workout and stay active for multiple hours daily along with my practice.
There’s a lot of practices for cycling and using it such as the microcosmic orbit and similar, I think @mulberry would know better as to the taoist practices, I personally have begun to use Bandhas not too long ago. You can also experiment with using visualisation to push the energy into each of your chakras and cycle the flow up. Basically the main thing is you keep your high energy levels flowing and maintain more energy than you expend. You can use the energy for basically anything, using it is a way to exercise your pathways and strengthen your ability and it also helps to build confidence in your practice.
No, you can’t not use it. You can’t keep it still, qi that is not moving is called “stagnant” qi and can kill you, you don’t want that. Living beings are meant to always be moving or they get sick.
Cultivate every day several times a day, more and more getting better and better. After some time you find the microcosmic orbit starts running by itself, and breathing in more qi feels natural and effortless. Then you’re getting somewhere.
You also will find, that you don’t need to take it all in and store it to use an abundance of qi - you are permanently connected to all the qi in the universe, like the cosmos is your battery, if you know how to connect up to it. You don’t hoard it you develop the ability to have it flow through you.
There’s a basic cultivation method here, and a bunch of books listed here. And a million videos on youtube from these authors and others, follow-along tutorials and all sorts.