A standard medieval sword replica prop would work well, but if you have the time and the skill, green lantern costume try your hand at crafting your own Jon Snow sword prop using EVA foam and other crafting materials. I’m leaving tomorrow after work! I found a shirt I can use for Aoba so I’ll wear my black with this instead. If anyone else sees photos send them my way! The hands/arms are foamular cut and carved to look right, then fur was added.