"What do you want with me, sir?" asked Credence, stepping forward.
"I was just thinking about your wonderful singing," said Grindelwald. "Maybe you could do it right now for our guests."
"Are you sure about that?" said Credence. "They are your enemies. Do they really deserve to hear my singing?"
"Yes, they do!" Vinda declared emphatically. And then, she quickly slipped out of the room. By the way, it turns out Vinda only likes opera music. This is canon now.
"I endeavor to be a gracious host, even to my enemies," lied Grindelwald, smiling evilly. "If the quality of your singing has an effect on my prisoners, that's just something I'll have to live with."
And with that, Credence loudly sang, "I want to know where I came from, and this is not dumb, at least I think it's not! Can I have a... pot?"
Grindelwald and Tina both cringed at the awkward lyrics and off-key singing, but Newt beamed.
"That was really good, Credence," he said good-naturedly. "You should work on developing your talent."
"Oh, come on!" exclaimed Grindelwald.
But just then, the door burst open, and in came... Theseus Scamander!