Your costume/ cosplay may not be a previous winner of any major award. Transform yourself into The Goddess of Death Hela with this New Style Thor:Ragnarok The Goddess of Death Hela Cosplay Costume. Each contestant will be given a few minutes to talk about their costume during pre-judging. Your costume should be appropriate for the convention. Some of the phenomena Gus, Elton and Astrid (Emma D’Arcy) — a mysterious, ’80s-overall-shorts-wearing girl who tags along — encounter are notably gruesome and sinister.