How do I taper a cylindrical object in blender? I'm trying to taper the object (on the bottom of the picture) in blender from it's cylindrical shape to match the profile of the tapered one (top of the picture).
That should be easy. Add a lattice to your scene. A basic one with just 8 vertices is best. Scale it in world space to match your engraved form. Don't do it in edit mode! Now, when the lattice object enwraps your engraved form completely, add a lattice modifier to it. Now, if you move a vertex of your lattice in edit mode, the mesh deforms accordingly.

Select the top four vertices of the lattice, press Shift+S and click Cursor To Selected. Now, you can simply scale these vertices, until your engraved form match the form of your cylinder.