u/Timely-Friend-5717

So, I've been researching the franchise for a long while and the Immortal Bloodline has always stumped me for one massive reason. The ending, specifically the part where Mamo randomly pulls out a 4D-Drive Engine which is apparently Dr. Mullhert's new theory. However I have never seen any mention of either of those two things in the series nor have I ever found any trace of this in real world history. So if anyone can figure out what in the 9 hells this is I'd greatly appreciate it. (Assuming Koike didnt actually pull it out of non-existence)