Supermassive space dragon

Supermassive space dragons were a gargantuan reptillian species which evolved from tiny lifeforms over millions of years. Unlike most space-based lifeforms, space dragons evolved inside a star rather than a nebulue or asteroid belt. They were durable enough to survive near the surface of a cooler, red star, but not in hot yellow, white or blue stars. They originally came from Grimmin Besh, but later moved to Araan after the latter consumed their original home. A pack of space dragons nearly invaded Tatooine, but were persuaded to leave by a droid nicknamed the iron man.

Biology and appearance
Space dragons were incredibly large, and this was due to having evolved on a star rather than a planet. The largest of these creatures were 4000 kilometres long, large enough to completely devastate a terrestrial landscape should they ever land on a planet. They has a huge bulky and muscular body covered in armour that could slough off turbolaser blasts as mere annoyances. They had long necks and huge spiked tails, and reptilian heads with teeth as large as mountains. Their massive claws could dig up a planetary crust with ease. They were also considered sentient, able to communicate in their own language, although apart from this, they had no society. Thankfully, these creatures were very rare, and, unlike certain other space based organisms, were unable to travel through hyperspace independently. Space dragons often lived off the stellar gas in which they lived in, but they were also known to eat titan space slugs, nebray mantas and the occasional unlucky starship. Despite being able to reside in stars, space dragons could only live in the cooler red stars. Some isolated reports suggest some lived in orange and yellow stars, but most could not bear such heat, and even going near a white or blue star was utterly unheard of.

History
Space dragons originally evolved from microscopic organisms in a protostar which would become Grimmin Besh. When the protostar first ignited, it failed to sustain its mass and became a brown dwarf, giving the organisms time to adapt to the ever increasing heat. When Grimmin Besh finally succeeded in igniting and became a red dwarf star, the space dragon thrived in the heat and evolved to their current form. Millions of years later, the star named Grimmin Besh was consumed by the red hypergiant called Araan. The space dragons continued to reside on the surface of this massive star, but also formed colonies elsewhere. It was widely known that the star Araan could self destruct anytime soon, and so the space dragons attempted to form a colony on tatooine. However, the dragons were repelled by a droid nicknamed iron man, who claimed he was more durable than any of them, and proved this by lying in a fire for 5 minutes. The dragons scoffed the pathetic droid, until he pointed straight at Tatoo II, and said that the dragons should try it out in a fire their size. After the dragons survived the bright yellow star for 5 minutes, the droid lay down in the fire for 10 minutes, and then ordered the dragons to do the same. The dragons did survive for another 10 minutes, but came back singed and burned. The droid then lay back in the fire for 20 minutes, and the dragons reluctantly did the same. They attempted to be as durable as the droid, but six of them perished in the deadly flames. The remaining four fled the system back to Araan, while iron man and the natives of tatooine laughed at their foolishness. Araan did eventually explode in a hypernova, and the dragons were presumed extinct. However, there was still a substantial population on other stars scattered throughout the galactic rim.