[OP: ]
Before Lucy fell, the large sword made of all his swords was shot towards the creature and though it was a very close call, he managed to hit the chain that was glowing in blood red color perfectly.
The sword certainly pierced through that chain, then the body of the creature and, at last, it also hit the innermost core of the creature and destroyed it, destroying the only energy center of the creature.
As soon as this happened, the creature screamed so loud that the entire area around it started shaking uncontrollably, and the dark energy surrounding it started to vanish into the atmosphere.
The creature continued screaming, with agony, pain, unbearable pain. The sword stuck to its body also started to disappear into particles of light, but the process of disappearance of the sword was slower than the process of the creature's darkness's dissipation.