Spiked Dragon

Unevolved

Greedy little goblin, look what he's found
A mountain of shinies deep underground
But here comes the lookout, so big and so tall
And goblin learns dragon is shiniest of all.

Evolved

Greedy little goblin hides in the night
But the shinies he stole shine far too bright
"Oh crumbs," says goblin, "if only I'd known,
That life is the shiniest thing you can own!"