Lowering the edge of a plane

I’m procedurally creating a limited perlin noise based plane, viewed from the side in 2D for my vehicle to travel over, and would like to lower the edge of the plane that is facing the camera. I guess just lowering the Y-vertex of that leading Z edge should do it. Any pointers on how to do that for a poor confused newbie? Thanks!

You could use a cube instead of a plane, but I’m not sure if that would work.

G-Modifications

Thanks for the suggestion, I have toyed with the idea of using another shape/3dmesh, however I’m curious whether its possible to just alter the existing plane as described above - any advice on how that could work folks?