The Death-O-Matic By Wind 3000 is an invention made by Goomba.
The machine looks like a cactus in a pot with a red top. It's cactus-nature was emphasized when Goomba touched it and pricked himself. It could be an actual cactus that Goomba somehow fit a fully functional tornado-creater inside.
It is capable of creating a totally invisible tornadoes at will. It is unknown if it will continue to create other natural disasters throughout the series, but the "by wind" part doesn't support the theory.