From the photo, it looks like if it hits you wrong, you’re screwed and it’ll hurt so bad. That spike looks cool but the string would EASILY be caught in it.
It’s really kinda cool looking from the sketch. I’m thinking if you are able to really keep those outside edges sharp you may have finally developed the yo-yo weapon the Filipinos were rumored to have so many years ago.
New from the collaborating design efforts of aznnboyaZ and X-Acto, The Buzzsaw Yo-Yo!
Then use AG2 rims
And cut that IRG to work in conjunction with the undercut in order to add rim weight while being able to keep the yoyo light weighted