i think you may be allowed to use the blood puddle, i’ve uploaded one into one of my old stories before and used it the same way you’re trying to.
but i’m not sure you can use the actual wound though it might be too graphic.
to be sure i would still send a support ticket to episode and ask them, here’s the link: https://episodesupport.zendesk.com/hc/en-us/requests/new?ticket_form_id=114093965234