Cut toposolid with Dynamo Direct Shape

Hei, Dynamo fórum community!
I wonder if it is possible to cut Revit 2024’s toposolid by using a Dynamo solid. My first aim was to use Directshape.bygeometry but I think I still don’t understand very well this node cause it seems to be created into Revit environment but it dissapears when closing Dynamo

My idea is to model, very simplified, the slope that the terrain has near to the building. For example i wanted to pass from this:

To this one:

I don’t know if it is possible. I was thinking in use Clockwork’s “Element.CutGeometry” to intersect them in this way

But i think all this stuff is not being well planteated
I don’t know really how to continue

Any ideas?