Unending Ice and Snow Region
When he read this report, Theo was still unaware that everything he received came from his parents, from the basic training of Five Aspects that gave him the best foundation to his artifact.
The basic training came from his parents, who used their connections to learn from many masters who specialized in their own Aspects, creating that perfect basic Five Aspects Foundation.
The Materialization Skill Book came from Ray's own understanding of Control. Even though his power wasn't as strong as Leonardo's, he was once known as the greatest genius in Control. He poured all that knowledge into that small notebook. If Theo didn't destroy the book after learning it, there would be a bloodbath just to get it.
Last but not least, the blue artifact. Valerie asked Nina to give it to Theo so that the latter didn't know his parents had given him all this stuff. And it also pushed him away from the Griffith Family.