Ok discount Thanos. You either torture or kill, you can't do both at the same time... See this is a prime example of how evil fails, they just want to do everything, but sometimes they literally can't because 2 of the things are contradictory.
What desperate attempt to try to pump up a challenge to Zero... I expect one or two episodes at most for Zero to finish him. I wonder what secret super techniques Zero will unleash on him?