Some kid said Gold Imp lol. I understand it's a castle drop and that's why he said it but it's actually a golden valkyrie helm. It should maybe be called a Gold Imperial Valkyrie Helm too since they give the same stats as Imperials ( Blue, Green, Purple, Orange) the ones that is released in-game at the moment. But I don't know, since it's drop rate is 2%. Released Imperials are 0.50%.
Anyways, +1 for it!