I wasn't able to get together a decent reference image for Gost but [url=https://vignette.wikia.nocookie.net/xcom/images/f/fd/XCOM2_WotC4.jpg/revision/latest?cb=20170625214747]this[/url] is a good enough reference of what his mask looks like.[url=https://www.forgeworld.co.uk/resources/catalog/product/threeSixty/99550108158_SecutariiHoplites1360/01-01.jpg] These guys [/url] were a general inspiration for his robes and metal armor/implants look also. Should function for a rough idea. I'll try to have a lore sheet up for the Necrodomii today.