Back at Nurmengard Castle, Grindelwald was using a portrait of Dumbledore as a dartboard.
"Hey, that tickles!" said portrait Dumbledore every time a dart hit him.
"Why did you have to turn your back on me, Albus?" asked Grindelwald. "So, I maybe killed your sister that one time. Big deal. You never liked Ariana that much anyway."
At that moment, Vinda entered the room, nefariously. "My liege, I bring you great news," she said.
"Has my autographed photo of Clara Bow finally arrived?" he asked. It turns out Grindelwald hated all Muggles except for Clara Bow, whom he had a little crush on. This is canon now.
"No, it's Credence," Vinda explained. "I've just learned that he ran away, and Scamander is now looking for him in London."
"That's good news for our evil plan to kill Muggles, wipe out fantastic beasts, and cancel TERFs!"
"That is so evil, especially the third one," Vinda gushed.
"I know," said Grindelwald, grinning fiendishly.