This poem was inspired by a particular frame in an issue of the comic book, The Uncanny X-Men (either Uncanny or just plain X-Men).

Here's the basic story.
Wolverine is a character whose skeleton was laced (against his will) with adamantium, the hardest known metal.
Magneto is a villian with the ability to control megnetic fields.
During a battle with the X-Men, Magneto pulled the adamantium right out of  Wolverine's body (leaving the skeleton, of course).
The only reason this did not kill Wolverine is because he also has increased healing abilities.
Wolverine also has retractable claws that extend from his knuckles.
He had always thought they were a part of the adamantium "implant", but after the battle,
he discovered the claws were only laced bone, and that he had been born with them.

The frame I mentioned was of a bandaged Wolverine sitting outside under a tree, and he had just spoken to a young friend.
He had one set of claws extended, and there was a butterfly either sitting on one of the points, or flying near one.
I don't recall exactly, and my comics are packed away, so finding out for you would be quite inconvenient.