Liam clenched his fist and forcefully brought his mind to the task at hand. He needed to extract the wyvern's soul. As far as he was concerned, this was the sole reason why he had struggled and fought so hard, and it was still within his grasp. So he did not want to miss the chance.
As far as Dimitri's soul was concerned. He took out a black bead from his inventory and sent the soul into the bead. This was an item that had been sitting in his inventory for a while now. He also had other black beads that were stuffed full of souls.
It was ironic that when Liam faced the dark elf the last time, he had tossed one such black bead, putting him in a world of agony and tormenting him before finally dying to Luna, and now the tables were turned. Liam used the same black bead to store the dark elf's soul.