Binding off a lacy patterned scarf

So here’s the problem I’m having. I cast on 23 stiches which repeats the pattern twice-it is a lacy pattern called a “horseshoe”. There are 8 rows to the pattern. The beginning edge has 2 points and the scarf is as long as I want it. I want to finish it but if I cast off, I am afraid the edge will be straight across and not come to 2 points like the beginning edge did. How do I cast off an get a pointed edge at the end of the scarf?? Anyone??

If you do the bind off row in pattern, with decreases and increases, it should be scalloped or wavy. Even if you bind off on the WS row in purl, it will be anyway.