As you say that, a light shines just behind you. Something else comes through the portal: the contraption that Lucy had found. It floats in front of the both of you, and a small tube at the top fills slightly with a glowing pinkish liquid.
"Gah!" Edgelord recoils in pain, clutching his head. "What is that!?" You and Lucy continue to watch it until it slowly lowers to your feet.
"I think..." Lucy touches it with his paw. "I think that is... harmony. If we work in harmony with one another, then we can overcome any despair!" He looks back to Edgelord, who is inching back towards the second portal. "That is how we will beat you, Edgelord!"
"Good luck to bad news," he remarks. "You'll never help them all, though you're welcome to try! I'd love to trap you in here too! BWAHAHAHAHA!" He cackles once more, then backs into the second portal.