Board Thread:Manga/@comment-26495049-20180831081518/@comment-30473998-20180831213042

Good point. Although this is unrelated, I've also always wondered how Zeke injected his spinal fluid into other Eldians. There was a theory that it was put into their well, but wouldn't the spinal fluid just evaporate?

And now, to address the post -- I think that Zeke wouldn't just let another titan injest the spinal fluid. The Marleyan Titan Biology Research Society (whoa, I remembered that?) might've had him do some experiments with Eldians (yes, as cruel as that seems... it probably happened). I'm guessing that you have to actually sever the spinal cord/nape/wherever the powers are contained in order to gain the powers or pass them on.