Looking for ,,skin,,

I am looking for skin, propably released in Delve mechanic. It is something what is under player and it looks like old tower clocks with moving clockwise and wheels, in cyrcle. I am not sure if its skin for aura or something else (from full armour set). Cant find it on google. First time I saw it in old video where guys was playing Marauder propably and it was in delve. If someone know please type me.