Need help making a domain expansion and picking a hand signs for my OC

I've tried think about a domain for my OC CT ( https://www.reddit.com/r/CTsandbox/s/TfIj5NeajH )

but I can't think about anything other then just oh sure shit shikigami and that's not the only effect I want. And i can't think of a of name or look either I'm just blanking.

The 3 images are the hand signs im picking between