Ah, now I see what you are trying to do. You want to both align and resize all in one go. I don't know of any 3d solids that have that capability in FreeCAD. It might be possible to configure the wedge using the expression engine to take placement coordinates from various Part Vertex objects for the various properties of the wedge object. You could drag the Part Vertex objects around using the transform dragger tool. As an example, the z placement of a Part vertex would be referenced by one of the z properties of the wedge. It would complicated to setup, likely requiring a lot of trial and error, but perhaps doable. It would be best done in a macro so it could reused. As an example of this, see the attached file. In it I have a single Part Point (Vertex) linked to the zmin property of the wedge. Double click the vertex from the tree and drag it up or down in the z direction. When you clock click ok the Wedge zmin property will change to where the point is now located (within reason, as we can't ask FreeCAD to produce the impossible wedge.) This is just a proof of concept. You would need to align other properties of the wedge, for example ymin and xmin to points, too. Aligning these control points to the sword tip could be done with manipulator or even directly from the placement task easily enough. The problem really is this is way more complicated than other ways of doing this would be.
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