Card for changing the type of lands in the library
There is no card with such effect.

The only card with an effect like the one you describe would be Painter&#39;s Servant, but it doesn't change cards type, only color.

In the case of Sphinx&#39;s Tutelage, there is no 1-card-trick that would allow milling and entire deck with lands in it.

In legacy, a similar effect is usually achieved using the Painter&#39;s Servant + Grindstone combo.