"Child Emperor mentioned the trouble you caused in Kirigakure in his routine report last month. Combined with this card's unique energy signature, it was easy to make the connection."
As Sasori spoke, he raised the card to eye level. His pupils narrowed slightly, as though he were conducting a more precise scan. "Tell me exactly what you experienced."
Boruto gathered his thoughts. "Last time, during the exchange in Kirigakure, Sarada and I ran into a powerful enemy. Things got really dangerous, and then..."
"The card against my chest suddenly got hot. Then I thought I heard a voice. Not with my ears—it appeared directly in my head."
"It felt like he was calling to me, answering my frustration and my will to fight?"
"I acted on impulse and made the signs for the Summoning Technique we learned at the Ninja Academy. Then he actually appeared! Red-Eyes Black Dragon! He turned the fight around for me."
Boruto paused, looking puzzled. "I'd felt something similar a few times before that, but it was faint and vanished in an instant."
"But since that time in Kirigakure, I've tried several times to summon him again, and I can't."
"There's no response at all. I can't even sense a Contract. It's like that one time was an accident, or he fell asleep and the door closed."
"My father told me you're not only an Advisor to Sunagakure, but also the main developer of the 'Duel Monsters' card game and the technology that goes with it."
"So do you know what's going on? What exactly is this card?"
Sasori listened in silence, his fingers brushing across the card's surface as though feeling its material and the traces of energy within it.
Only after a long while did he hand the card back to Boruto. When he