Well, since I am 90% sure I got this one right, I might as well continued. This one relies on the connection I couldn't help but noticed
We are guilty of the same deed
You, the first perpetrator
While I am the second
Yet, I achieved what I wanted
Although it came at a price
You paid one too
And you paid it thrice
(Oh, and it's NOT Maeglin and Gollum. Nor is it Maeglin and Grima. Use this information how you will.

)