[Lucy's POV: ]
The darkness overtook her and the materialization of the corruption was complete.
She was gone, the last remaining light she possessed was gone as well.
All that remained now was a shell run by the dark power that wasn't liked by any of the factions of the Worldline.
It was a state worse than death where one's body was overwhelmed by an uncontrollable negativity that was practically nothing at all.
'Corruption.'
It's more of a concept than a state of being known to most who know a little about the Worldline, and those who have even a little knowledge of it, don't wish for even their worst enemies to fall into this state.
There is little knowledge about this 'concept' but from all we know, even we considered this state very… miserable.