A thought I had for Vel'koz and Thresh

What if Vel'koz had a mechanic to where when playing against Thresh he can see the souls of his (Vel'koz) team and being a being of pure curiosity be able to attack and 1-2 hit kill them to absorb them for a stat boost to something like AP since his eye laser assimilates all into knowledge for him. Also Secret Boss Vel'koz and Antihero (Some cool way to make it an Arcade type) Thresh. Vel'koz out to destroy/assimilate everything including souls, and the collector and warden of souls forced to team with good and be a protector. Thought this while listening to Bit Rush on repeat.