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Zed would be in shiny futuristic armor his wrist mounted blades could have electricity pulsing through them or be beam weapons similar to miniature light sabers or energy swords. His shurikens could be like tron discs or something that looks futuristic.
For his shadows Zed would through out holograms of himself similar to the hologram from the pulsefire ezreal emote where it's made of blue light similar to a hologram from starwars. when he switch places with a shadow he can have a cool animation where he dissipears in a flash of hologram pixels or shiny particles to hint that hes using some sort of teleportation device.