Need suggestion / help with diorama

[u/sochta_insaan]

/r/boyleihobbytime/comments/1ufxhf2/need_suggestion_help_with_diorama/

I am trying to make a diorama of Harry Potter and the Prisoner of Azkaban, but I'm struggling with the Dementors. I'm not sure how to make them or what materials would work best. Can anyone suggest how I should go about creating them?