Craf is not inmune to electricity, He gets charged with electricity and when he gets charged enough he gets in this temporal state. he is faster, has the ability to fly, can make light, can shoot electric attacks. it is need a lot of electricity to get him in that state

Anyways this is a thing i have in mind for a long time yet i dont draw about since it is lore stuff that i dont wanna show yet, there a lot more but for now ill let this here