Meanwhile in a cave North of Arendelle, a small urn sat.
The urn housed the former Prince Toya.
Within the urn he watched the events unfold, watched the young Shoto become more and more like he had been at that age.
"Toya..." A dark voice, shadows entering the urn.
"Wh-Who's there?" Toya said. "No one can enter this place!"
"Fear can enter anywhere," All For One smiled and appeared in the darkness.
"No! It's you!" Toya shouted. "This is all your fault! I'll never trust you again!"
"I have a gift for you." All For One said and handed her a mirror. "This is called the Spell of True Sight. It will make everyone in Arendelle see the truth they were forced to forget all those years ago when your siblings Natsuo and Fuyumi betrayed you and made you forgotten. I have already tested it on the Prince Natsuo of Arendelle; see how quickly he trusts and understands his brother Shoto? He is the only normal human to trust Shoto like that. What if everyone could see it your way Toya...at last?"
"That's all well and good," Toya said, taking the mirror. "But how will I get out of this urn to cast the spell? It takes three Todorokis to break the urn."
AFO only smiled. "We have Natsuo and Fuyumi—"
Chaira, held in Shoto's arms as he rushed to the Troll Kingdom, appeared in the Mirror.
"Yes yes," Toya said irritably. "But we are missing one!"
"And it will be easy to convince Shoto," AFO smiled darkly. "I have spent Natsuo's whole life training him. He is the Guardian of the Lost, and he will convince his brother to see things our way!"
Natsuo appeared in the Mirror. He had gotten tired of waiting; and saddled his horse, heading into the wintry night. Streaking behind him across the fjords was a long, dark, evil shadow.