Always Cubic

In lands observing this Law, no Block can have its shape manipulated. It's always going to be the 5'x5'x5' Block it is. Don't try to change it, because it won't work.
Law originates from Faunasphere, but other franchises who know they're 3d isometric might also be origin points. Just like in Faunasphere, you can't mess with a block's shape. So can you dig through a block? No. Can you place a block of water on top of a block of sand and the block of water is still a block of water? Yes! Does it make the sand under it wet? No! Does that make sense? No! But them's the rules!