"I'm afraid not..." Gellert Grindelwald shook his head in denial, a fleeting trace of loneliness appearing in his eyes. "I didn't teach him that magic."
"The Dumbledore family has always been accompanied by Phoenixes, and Albus himself is extremely skilled in Fire Magic. He didn't need me to teach him the magic of the Fire Shield charm."
"Could it be..." Serena Pendragon thought of another possibility. "Dumbledore took the initiative to crack your magic, then turned around and taught it to Vizet?"
Gellert Grindelwald continued shaking his head. "With Albus's personality, even if he cracked my Fire Shield charm, he wouldn't teach that magic to Vizet..."
Serena Pendragon asked curiously, "Why?"
Gellert Grindelwald explained, "Because the essence of that magic is Fiendfyre. Second is its function—it was mainly for me to eliminate dissidents..."
A faint smile appeared on his face. "To Albus, the Fire Shield charm is actually somewhat cruel, so even if he could crack it, he wouldn't take the initiative to teach it to Vizet."
"Of course... if Vizet asked for it himself, perhaps he would make some concessions. But I believe Albus would make improvements. He wouldn't teach Vizet the most original Fire Shield charm."
"That is a little strange..." Serena Pendragon raised an eyebrow. "You said this is your Fire Shield charm..."
"I know Vizet is outstanding enough, and he's invented quite a few spells. But logically speaking, he shouldn't have invented a spell exactly like the Fire Shield charm, right?"
A hint of amusement flashed in Gellert Grindelwald's eyes. "Vizet is the only solution I obtained after paying a sufficient price, and also the best solution."
"I have always believed that firmly... All I can say is, whether it's me or you, we both underestimated Vizet's talent. He is even more outstanding than we imagined."