How Betelgeuse captured Subaru's body like in the ending of episode 23?


How Betelgeuse captured Subaru's body?

Spoiler alert if you didn't watch episode 25:

> In the ending of episode 23, he captured Subaru's body which some would
> think was possible because Subaru has touched the book. But he didn't touch
> it in episode 25 and still Betelgeuse was able to capture him.

How? Why?




In episode 23 at 11:40.

> When Julius was having a conversation with Subaru, he said that Subaru might
> have an affinity for spirits. Since Petelgeuse was a spirit himself, he
> could possess the fingers' body which had been cast spell on beforehand and
> even entities having affinity for spirits. According to Julius, Subaru
> definitely matches the case.

