So it came to be that the Dark Lord Sauron was defeated at the battle of the last alliance and his spirit fled to Dol Guldur to lick his wounds.
About 30 years have past and most of the world had forgot about the great threat, Sauron and the Ring of Power. People, elves and dwarves had gone back to thieir everyday worries and business and so did a certain Winged urulóki called Smaug.
He had almost golden scales and which why he had the title "the Golden". But more important he was the last in a powerful line of fire breathing dragons. Smaug knew how his kin got killed and he had no intentions of doing the same. He planned on feeding on eagles of the Misty Mountains and live a peaceful life. He will only go in to battle on the day that his master Morgoth returned to Middle-Earth and only then.
One day while flying over Mirkwood a shade appeared in front of him. He stopped and flapped his wings to stay in place. Smaug knew who the shade is. It was the weakened Sauron. The dragons where never fond of Melkors right hand, and Sauron never came to them except when Melkor directly ordered him to because dragons where as strong as Maiars and the strongest of them like Glaurung or Ancalagon could even end his existence.
Smaug growled at him:
"What do you want ou transparent one?!" he said mocking Saurons weakened state.
"Mighty Smaug, I have come to propose a deal with you. You must feel quite lonely in this world deprived of dragon kind?" said the shade and it looked almost as it was smiling although it had no mouth.
"I have no time for your golden tongue fallen Maiar, TALK or be fried!!!" Smaug said letting out a small flame.
"There are more of those like you, beneath the icy Misty Mountains they are buried, but no one can free them yet. But if a certain FALLEN Maiar comes to power again..."
"STOP WITH YOUR LIES!!! Even if what you say is true you could never muster such power, even a lowly human defeated you a human with his Numenorian blood watered down so thinly that it's barely there! Prepare to die permanently now..." Smaug said in rage but when he took a breath to muster hi flame the shad said.
"Yes he did, but I can muster such power, with a new ring, a more powerful ring!"
"Continue..." Smaug replied.
"I will rise to power again and when that happens I will have my ring back and with it my body. Then I will create a new ring and whit its power I WILL RULE THIS REALM, and release your kin! But I will need your help."
"For that to happen I will need tons of gold and jewels, and your dragon fire. Help me and you will be the savior of the dragon kind!"
Smaug stood silent for a second and then said:
"I know you wouldn't dare lie to me, not in this state..."
"Very well, I will help you, but you mark my words ou lowly one, you betray me and I will burn your essence in to non-existence!!!"
And so it was, the Dark Deal was struck, and Smaug the Golden went to do his part...