Yeah of course!
The sword is entirely carved out of insulation foam board. This is a pretty thorough tutorial on working with it:
www.cosplay.com/showthread.php…To determine the proportions of the sword, I looked at a lot of images of Riven with her sword, and assuming she's roughly the same size as me I sketched out about how big I thought the sword should be and compared it to myself in a mirror to make sure it didn't look too big or small.
After carving it all out, I sanded any rough edges and used plain white Gesso on the whole thing to prepare it for painting. I just used cheap acrylics to paint it all up.
The tutorial explains all you need to know about working with the insulation board. The painting is a bit harder to explain, since there wasn't really a specific process I used; I just sort of felt it out as I went along.
I hope this helps! Let me know if you still have any specific questions.