Hextech Azir
http://lfg.hu/art/data/media/36/AuriokReplica.jpg (art from Magic The Gathering: Auriok Replica card)
I could imagine this being a good 975rp -1350rp skin for Azir. He could summon constructs made out of gold metal, his turret could make autobot transformation sounds when being built, plus he could be given a robotic filter for his VO.