LAF2019

First off, I need to make it known that I am not afraid of Y seams or partial seams. now, that doesn't mean I'm great at it, but i don't necessarily avoid them.
That being said, is there such a thing as a W seam??
I am making a quilt with "W" edges (or even more mountains a valleys). is it possible to sew those into a matching "M" background fabric? the fabric I am using for my "W" piece (picture a diamond with the top corner jaggedly chopped off) has a pattern/style to it that will lose its effect if I have to cut multiple little diamonds and piece each individually with the background. I want to use just one piece of the fabric.
I know most will say i should applique instead of piece it, and I may end up having to do that, , the question still stands.... I can piece deep curves together, can I piece sharp points???
Thanks!