The speed might of been made a while ago and nobody really cares about it, but I'm making this CRT to try and debunk this, because it looks sorta iffy to me.
This is the speed feat(s)
Ok, I'll start with this one. Veldanava was the source of time yes, but rimuru is not whatsoever superior to him on a conceptual level, maybe comparable or simply superior, but I have never seen any feats or anything like that showing rimuru to be conceptually superior to veldanava. Since I'm not fully knowledgable on this stuff, I don't know if being simply surpeior and not conceptually makes a difference, but I'll assume it does.
"Space Time Control... Instantaneous travel is possible with my will alone."
Not much to say about this, but him being able to instantly go anywhere with his will alone is not through the use of physical speed, but instead it's through an ability, "Space Time Control."
>Conceptual Manipulation (Type 2. Turn Null is the primordial energy which was used to create the several parallel worlds that exist. Turn Null can create and destroy everything. Using his Turn Null Veldanava created the universe and the spirits. The universe is destroyed as a result of a great spirit being born and erasing everything, life and death, and even the other great spirits whose birth gave rise to the existence of their respective elements.
While I'm at it, I think I should also mention conceptual manip, I heard conceptual manip in tensura is outdated and is realistically type 3, not type 2. Conceptual manip is confusing, and I've seen the reasoning for the change to type 3, but it was just a simple vauge explanation, so I think a good explination should be provided for it and then later change the type 2 to type 3.