Kayson reached out and took out the locket, but this locket was not a Horcrux. He casually opened it and saw a yellowed piece of parchment inside, then hurriedly snapped it shut again.
"There should be Regulus's last letter in here." He placed the locket in Sirius's palm.
"Oh... thank you..." Sirius carefully tucked the locket into his most secret, closest pocket, then rubbed his face hard. "I need to find a way to bring my brother's body back. You should go home first."
Dumbledore shook his head. "That isn't a good idea."
Sirius fell silent for a moment. "Perhaps you can help. Thank you."
"Maybe a Summoning Charm." As Lupin spoke, he acted as well, pulling out his wand and waving it. "Regulus Black!"
Unfortunately, nothing happened.
"It looks like... he... well... perhaps he has already lost his name. Now, he is only the most ordinary Inferius." Sirius spoke in a voice so unpleasant it was almost unbearable.
"Sorry."
"No, it isn't your fault."
Meanwhile, Kayson had already taken action. He pulled out the Newborn Magic Arts spellbook and edited something inside for a while—a simple large-scale interactive attraction spell, for instance.
After finishing the spell, Kayson directly fired it at the nearest Inferius. As the Inferius was struck, the interactive magic took effect, instantly linking every Inferius to the spell. They floated up from the water together, attracting and repelling one another as they maintained a relatively stable formation.
Sirius almost immediately found his younger brother in midair. Regulus, who had always been reserved, who at most had only ever revealed a quiet smile and had never once behaved improperly, was now snarling and clawing at them like a wild beast.
Following Sirius's gaze, Kayson waved a hand and restrained Regulus's movements to a slight degree that did