Shallan Davar

You may have Sakashima the Impostor enter as a copy of any creature on the battlefield, except its name is Sakashima the Impostor, it's legendary in addition to its other types, and it has "{2}{u}{u}: Return Sakashima the Impostor to its owner's hand at the beginning of the next end step."

“I seek the truth,” Shallan said. “Wherever it may be, whoever may hold it. That’s who I am."