White and Black Treatise pg 56. 25m cost, you have to mark out the area you want to affect in advance, you're limited to ([Intelligence + War + Essence] x 10) yards in any direction and you can't raise structures more than three storeys high or from unavailable materials (eg: raising granite walls on sand). Within those parameters, you can shape the earth and rock as you like over the course of about five minutes. I believe
@EarthScorpion had a Dragonblooded character who used it to replace Cherak's slums with mass-produced stone housing over the course of a season or two. You can also use it to rapidly produce trenches, fortifications, dams, flood channels, etcetera.