In the Battle of Angry, Morgoth released many winged dragons, and they caused great damage to Vera's elves army. And we know that these dragons are descendants of Glauron , but Glauron is a flying fire-breathing dragon, and the dragons behind them are descendants of Glauron. In fact, many giant dragons appeared during the Battle of Gondolin.
Before the Battle of Angry, Morgoth already had many dragons, and we don't know the names of these dragons. But among all the dragons, Glaulong is the most important one, and for many years, this dragon has worked for Morgoth. Morgoth feeds it himself, making it very scary. Grauron is also the beast closest to Morgoth's personality, and he is just a microcosm of Morgoth.
This dragon is not only able to speak, but can think independently, but is also very cunning and smart. It is full of malice and power. Glauron spoke almost exactly the same way as Morgoth. For the entire storyline of " Elf Diamond ", Grauron is a very important character. He destroyed the Kingdom of Nagorslod and had a brilliant performance throughout the story of Torin.
After Glauron's death, his descendants appeared on the battlefield of Gundolin and appeared on the battlefield of the Battle of Angry. The largest black dragon among them was Ankara Gang, which became the largest evil dragon in Middle-earth history. His appearance can be said to be Morgoth's last efforts.