Transmute Rock

5th-Level Transmutation
Casting Time: 1 action
Range: 120 feet
Components: VSM (clay and water)
Duration: Until dispelled

As in Xanathar's Guide to Everything with the following change:

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the size of the cube you can transmute increases by 20 feet for each slot level above 5th.

Source: XGE 169

Changelog

Altered upcasting option.