I used to make tombstones. (Really, I did.) Hows about these:

Here lies Nymble.
He wasn't as quick as he thought he was.

Or

Cap be Nymbel, Cap be quick
Betcha can't outrun a firestick.

Or

Nymbel -- gone and not worth remembering.

Or

Stranger, know as you pass by
That as you are now, so once was I,
As I am now, so you will be,
So swing by your tail and follow me.