OK I get. How about if it's not random, but the amount of force I need to use is dependent on where I take it from, according to importance to normal bodily function.
Like if I wanna make a leaf fall off a branch, it's my finger nail, and I can sort of, as a baked in part of the power, decide where I gets taken from as long as it meets the required energy?
I mean, that'd still make it somewhat OP, I think.
Though to be honest, your approach is similar to what I actually came up with as a consequence for a different superpower (time-space manipulation--which I think is a lot more energy-intensive), in the sense that it'd take energy from the least important part of the body to the most important.
However, I suppose just having the energy requirements already limits a lot of the OP potential of the superpower (can't just summon a black hole, lol!), so I think your changes are quite reasonable.
I mean, yes! But I don't really think ordinary object manipulation (like what we can already do IRL) counts as using the superpower.
The way I see it, it applies to things like telekinesis, or manipulating the mass of an object (making things lighter, or heavier), or even something as out of the left field as "manipulating gravitational lensing such that I can see things clearly". It can even be used in such a way that it can be lethal, such as "make someone's blood dense, and have them suffer a heart attack as a result."
The superpower is actually that OP in the sense that aside from the limits I've put (and the modifications we've agreed upon), only one's imagination is the limit.
Meanwhile, I was thinking more along the lines of FMA's law of equivalent exchange, but since the way equivalent exchange is handled is kinda hand-wavy, I tried to find a way to make it more realistic, while trying to limit the power's OP potential (hence, the random body part stipulation as initially stated).
TBH, I don't watch One Piece, but had I done so, I would have given you a nod by saying you need to be concentrating to use the power (and would backfire by randomizing the target of the power if you lost concentration).
And yeah, the only thing stopping me from watching One Piece is the sheer amount of episodes, lol! I want to start watching it, but I'm like, there's no way I'd be able to watch thousands of episodes just to catch up!
Oh man I need to watch the original anime! Know a good place I can watch it actually? I literally LOVE fmab haha. And would love to check that one out.
Also.. I'd say to you, and look, I'm sort of picky about these things, as we all are...watch the first half, then switch to Manga. Or just read the Manga from beginning.
I got into one piece without knowing ANYTHING about it so I'm super lucky and grateful.
It's got its flaws, but it's sort of apart of the style. It feels very stream of conscious and home brewed. I absolutely love it to death.
It helps that I started it during a pretty rough patch so it's like a comforting thing for me.
I think ultimately, it's worth it, and the length shouldn't be a barrier. It's just more content and I love the story. It's endearing. OK enough proselytizing. Lol