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"Father…"
Freyja glanced at the large "statue" made of black crystal, her father Fjord. The powers of Obsidian went beyond even what I've achieved so far.
It wasn't just Sealing, but it included Nullification, a power not even I have comprehended yet. And one powerful enough to nullify all things he seals.
Meaning that the things he turned are still somewhat alive, but unable to even be "themselves" their existences have been nullified, and they're only black crystals.
Time reversal? It would have worked if they were recently transformed, but it has been too long since then.
Eating them all and then trying to revive them? That only works with the logic of their souls still remaining unscathed.
However, their souls had also become crystal, if I eat them I'll only eat the black crystals, and they'll simply cease to exist as they dissolve.