"Percival Graves. Pleased to make your acquaintance."
"What are you doing here, Gellert?"
"I'm sorry...who?"
"I know it's you."
"I have no idea what you're talking about."

I need a fic where Dumbledore comes to MACUSA for a visit, is introduced to the president and her right hand man, and sees right through Grindelwald's disguise.