Legendary Skin Concept - Eternum Karthus

So I had this cool idea for a legendary skin for a champion that could use a new skin in the future.

His Q would be like a robotic red explosion (think of Eternum Nocturne).

His E would be a static field.

His W would be like a red circle of eternum cloud energy (Much like Nocturne's Q).

And finally his R would be like a lazer of death that makes a Reaper like sound effect from Mass Effect before literally melting the enemy team. While using his ult he could say something similar to what a Reaper in Mass Effect would say (Since Eternum Nocturne has many resemblances to the Reapers). Something like "You will not escape" or "Let the harvest begin!".