Well, the thing about MTG is that(and I'm copy pasting from the page I linked because it's almost ****ing 12 pm and hell no I don't have time to type it all out)
"Most planes are spheres with an atmosphere and one or more suns and moons; they resemble planets. But there is no law of physics common to all planes of the Multiverse.[3] Planes can be infinite expanses of matter, tiny specks of empty space, or logic-defying inversions of normal reality. A plane can contain an entire, sprawling universe or nothing at all"
Essentially every plane could be as simple as a giant ocean, nothing at all, or a giant bustling city. Think of it like a Minecraft World or a randomly generated dungeon. And most of them are similar enough so that people coming by at least can get a grip on that Plane's Reality pretty easily(which just so happens that most planes have Earth like reality. Gee I wonder why
)
Hell you can even create your own Plane if you have enough strength,
Snake, I don't think that's a phrase that's helping your post at all.