The worst part about these aliens isn't that they're the most evil beings I've seen, it's that they aren't evil all the way.

If there's salvageable and unsalvageable beings, these are the annoying 3rd category of the worst kind of evil scum who are still salvageable but it's super difficult and no one wants to go near them. They destroyed entire planetary systems during their lives, and compressed their karma in the most effective way, never looking back at what they had done, always looking forward and never regretting anything. Words don't describe how horrible they are. Yet, they are beings with awareness.

I created a bot/servitor specifically to be able to deal with them after I managed to surround them. It's a karmic repayment organizer which mechanically works on their souls using well known and tried alchemic processes to extract the stolen energy from them.

But this is not enough, I want an apology. Otherwise they may repeat it again later and learned nothing, maybe they'd come back with even more evil methods next time. Maybe this is what happened, they were beaten up by someone and instead of taking this as a lesson not to do that again, they invested all their efforts into avoiding the punishment instead of avoiding the crime. Then this was repeated over and over.

I placed one of them in an eternal time dimension and let the process run. It took 10^29 years before he was ready to apologize and voluntarily pay back for what he had done. That's 100000000000000000000000000000 years.

When he came back all of his energy channels had been forced open and purified particle for particle, but only to the point where they could be placed in the bottom room of the sanatorium.

I'm working to recreate the planets and races they had ruined now, using the energy extracted from them. I feel a relief now, this darkness must have had a strong effect on the Earth. Some of their victims are already revived.