Ok well i was thinking that it'd work sort of like glitches in videogames. At least visually, and it'd only work on non-living objects or himself. The first part of it is the altering distance part, which would usually just be making things teleport around. Size, well that one moslty how it sounds. Being able to scale up or down objects and/or its weight and impact. The shape would be like sorta molding stuff or creating 'glitches'. Like he would create a hole in a wall by making what he wanted to go through flicker out of existence be it temporarily or permanently. This is what i was thinking, I understand if its a little bit too much. I won't mind tryin to change it into another primal magic thing, I do have another idea for this if the space one is a bit op 8D