需要加to吗？

of 改成 to

原句就是
Since then I take infinite curiosity and energy into exploring the magical world. 和 We belong to the magical world.
的缩合。

合成定语从句的时候介词要放到连接词的前面。
所以是 ... magical world to which ...

要加

+to
belong to 后 实际上是接 which