OmniSpectra
If he needs to fight his way out (instead of servitude) I hope he takes that option and I hope you don't go the route of having the Mc serve under Frieza in the Frieza Force like Vegeta did( it didn't do him any good power wise serving under him in the first place, just stagnation and false pride), it would honestly be a waste of time and I doubt his Saiyan Pride would accept being under 24 Hour watch while being called Monkey and mocked all the time, when he could just take his friends and family and leave Frost Demon Territory until they get strong enough to kill him.