Here's the lyrics and my translation.

http://vocaloidlyrics.wikia.com/wiki/Doll/ArukaP

I'm unsure about what これ in the second last verse refers to:

僕らは忘れてる あの時使ったはずの魔法

これにかかった世界は[IMG]file:///home/raichu/music/vocaloid/makell/dst/question.png[/IMG]全てが愛で溢れてた

Is it the teddy bear? Like it was referred to as 彼 earlier when she was young but became a これ when she grew up to show she lost her childhood dreams?

Or am I off on a tangent ... Any ideas?