Meaning of もの in this song


最近、小松未歩という歌手の「謎」という歌をよく聞きます。

全体の意味は(想像のもとで)たぶんわかりやすいですが、1行目の歌詞が何回聞いても読んでもわかりません。

> この世であなたの愛を手にいれる **もの**
>
> 踊るライト見つめて忘れない ahh 謎が解けてゆく

「手にいれたいもの」のほうがよくないですか。 なぜこんなところで「もの」を使いましたか。どういう意味でしょうか。

歌詞: <http://www.kasi-time.com/item-14804.html>

ビデオ: <https://m.youtube.com/watch?v=sQnznXS_MJs>




I know this song since my childhood, but have never tried to think about the
lyrics seriously...

> この世であなたの愛を手に入れるもの

I interpret this as "the thing with which one can obtain your love." Since
this is a song about 謎 (mystery), one may translate this less literally as
"the key to obtain your love". I think this もの is 物 (="a thing").
Grammatically similar expressions include:

>   * 字を書くもの something to write characters with (i.e., a pen)
>   * [いい夢を見られる道具](https://japanese.stackexchange.com/q/46532/5010) a device
> with which one can see a good dream
>

* * *

Let's consider other possibilities of もの.

Can it be 者 (="person")? If it were 者, the sentence would mean "the person who
wants to obtain your love". But 者 is [a fairly stiff
word](https://japanese.stackexchange.com/a/21536/5010) and I don't expect 者
used like this in a love song.

Can it be the sentence-end particle
[もの](http://dictionary.goo.ne.jp/jn/219750/meaning/m0u/), which is often
colloquially changed to もん? Then the sentence would mean something like "You
know, I'm gonna obtain your love!" At least it's grammatical, and this sounds
like she is determined to do so. However, this もの [sounds a bit
childish](https://japanese.stackexchange.com/q/32322/5010), and does not match
the context that follows. The person in the song is wondering and hesitating
throughout the lyrics. She is not naively trying to be loved by あなた; she is
trying to solve the mystery of love in a rather objective manner. (In
addition, I feel the melody and the way of singing show that this is not a
sentence-end particle もの, but I cannot explain this logically.)

I feel 「手に入れたいもの」 is not natural because what she is talking about in the
first line is 謎, not her personal desire.

* * *

**EDIT:** Let me add two other reasons why I think this もの is _not_ 者. (1) 者
is almost always written in kanji. There is no reason for using hiragana for 者
here. (2) Again, context. There are only あなた and 私 in this song. There is no
third person, and "who will be the one who obtains your love" is not the topic
of this song. The motif of this song, 謎, which she struggles to solve, is the
difficult relationship that exists only between あなた and 私.

