Karma seal plays a big role in the anime boruto it is like an otsutsuki’s usb drive when and otsutsuki dies they implant karma and the nearest creature to turn their body in their karma seal can work two ways the otsutsuki turning vessels body into their or the vessel learning to use karma there are different types of karma the one described now kawaki’s karma seal which has no otsutsuki or white karma
Momoshiki: *dies
Karma seal: downloading