#owl house theory
The real reason why Belos keeps making the grimwalkers of his brother
They’re test subjects, just like the Basilisks.
Belos wants to live forever, and he’s obviously not going to do that in an aging, decaying, maimed body of his, when he has a way to recreate a perfect copy of his old, young and fit body.
This could also explain why he keeps making the Golden Guards younger in each generation.
Notice that he comments only on Hunter’s appearance, not on his personality. He doesn’t care about that, all he wants is a way to create a new body for himself, that will be the same as his old one. I guess he plans to transfer his consciousness to it.
And who on the Boiling Isles makes for a better test subject than another human? Especially one with similar genetics to his own?