I am a family of kings
But I am the worst of my brothers
I connect 5 to 13, but only if 9 is added to 4
To some I am the first thing discarded
To others I am the last, most valuable possession
What am I?
Edit: I came up with this myself, and made it a bit too cryptic, I think. Here's an expanded version as a hint:
I have 6 brothers, but I am the worst of them all
I am what connects 5 and 13 and more, but only if 9 is added to 4
More hints! Everyone loves hints!
Line 1: There is some wordplay here, but the word family can be taken almost literally.
Line 2: By worst, I mean best. Not everyone would agree that we even have a ranking, but it's my nature to think this way.
Line 3: ...and 4,973...and more
Line 4 and 5: These lines are true, but really only a mediocre match to the puzzle solution. Don't bother thinking too deeply about them.
A final round of hints that should hopefully get someone to the answer I intended. Thanks to everyone who answered or attempted the riddle!
Line 1: A _____ is a family of "kings",
Line 2: but _____ is one of a well known group of seven things.
Line 3: With a small manipulation, this word can change into another.