In case you didn't read the title, no, this is not real and probably will never be real.
It's purely for comic relief. So don't go bashing this as false information.
So me and a friend were discussing the future of Generalists, and whether or not there would be a Generalist sub. (probably not was the conclusion). Thinking of the Empyrean's Heavy Weapon, I said it could be a sub if you strapped a "Heavy Rock" to it. Then I got a bit carried away and this was the result.
Again, this would probably never exist because the logistics would be weird (is it a sub or not a sub?) but it's fun to think of stuff like this.
I have no idea what I'm doing.