It sets blocks in front of you to gray (I replaced text to basalt to make mountains, but you only have to replace text to change it, or replace region.
Its more efficient than pasting small mountain pieces, because it doesn't require moving, stopping to hold DPADup and paste, repeat.
It activates upon swinging a stick, and deactivates on a second swing. It spawns in almost a sphere, but every angle you look changes it. Diagonal angles make it more checkered on the top, looking down or up make a flat wall, and looking N,S,E, or W make it a sphere(for the most part).
Its fun and a lot less effort that stopping to hold DPADup every time you want to paste.
It also adds a ton of detain to otherwise smooth system components