Only six dragons in Middle-Earth were named. Though some, like Smaug were infamous, others, like Gostir, were only known by name. Dragons named by sources other than Tolkien are stated to be non-canonical.
Tolkien named only four dragons in his Middle-earth writings. Another, Chrysophylax Dives, appears in Farmer Giles of Ham, a story separate from the Middle-earth corpus. Chrysophylax is a fire-breathing dragon, described as "cunning, inquisitive, greedy, well-armoured, but not over bold".
Ancalagon, often titled "The Black", was the greatest of all winged dragons. He was bred by Morgoth during the First Age and was the largest dragon to have ever existed in Middle-earth.
Described as a "long-worm", although this imprecise term seems to be more of an expression rather than a separate taxonomic group. Smaug — the last great dragon of Middle-earth, slain by Bard of Esgaroth.
Smaug is aware of the return of Sauron, and was apparently intent on joining forces with him (although there was some amount of confusion as to whether the dragon's motives for an alliance with Sauron were).
Smaug, despite his size, was not the largest dragon in Middle-earth, as Ancalagon the Black takes that title by a landslide. Morgoth, the Dark Lord, created a series of vile creatures, including dragons, during the First Age of Middle-earth.
Smaug's dragon-fine would not have been hot enough to destroy the One Ring. The malevolence that Sauron put inside of the Ring could only be destroyed in the Cracks of Doom, so Frodo was compelled to make the journey to Mordor.
The battle between Gandalf the Grey and the Balrog of Moria is one of the high points of The Lord of the Rings: The Fellowship of the Ring, as the wizard valiantly sacrifices himself to keep the monster from destroying the remainder of the Fellowship.
It is later revealed that Smaug's attack on Erebor was all part of Sauron's design, meaning that Smaug and Sauron were in league with each other. Smaug was considered one of the highlights of the second film of the series; several critics hailed him as cinema's greatest dragon.
Smaug could easily have cut through the armies of Mordor, and delayed the invasion of Middle-earth by years. So it wasn't in Sauron's interest to take on the dragon, but that doesn't mean he saw it as a lost cause, as he fully planned on creating an alliance.
Although the most famous, he is not the only dragon in Tolkien's Legendarium, and there are layers of curious details hidden beneath his impenetrable scales that only the most hardcore of Tolkien enthusiasts really know about.
The majority of her powers come from her Ring of Power, Nenya, the Ring of Water. The ring, also known by the names the White Ring and the Ring of Adamant, is one of the three Rings of Power given to the Elves of Middle-earth in the Second Age.
Smaug was probably the best-known dragon in LOTR, but he was far from the most powerful. The greatest dragons in Tolkien's mythology lived during the First Age. Morgoth bred them as some of his greatest servants and unleashed them during the War of the Jewels. The worst of them all was Ancalagon the Black.
Morgoth, seeing his armies in disarray, unveils, as a last resort, the winged dragons led by Ancalagon the Black. Eärendil and Thorondor are confronted by Ancalagon in an aerial battle in which the dragon is shot down, bringing down the peaks of Thangorodrim and defeating its master.
Like the Balrog, Smaug was too powerful for Sauron to dominate. Sauron might have made use of him, but likely would have had to wheel-and-deal with him as an equal.
Still, the dragons proved more effective in battle. Then there's Gandalf the Grey, who managed to kill a Balrog single-handed, but decided to manipulate some Dwarves and one very reluctant hobbit into dealing with Smaug.
If he is using black arrow. The black arrow is just a normal arrow so that wouldn't have any effect. Bard only knew where to aim because he could understand the thrush that heard Bilbo talk about it. So Legolas would only be able to kill Smaug through sheer luck or he would have to see the gap in the gemstone armor.
There is no account of any dwarf ever killing a Balrog, let alone multiple. The only recorded instances of Balrogs having been slain are Gandalf's slay of Durin's Bane, Echtelion's slay of Gothmog and Glorfindel's slay of an unnamed Balrog.
Smaug is able to detect Bilbo through the Ring's invisibility, but the hobbit does not even need the Ring to survive the meeting with the dragon, relying on his wits to flatter the dragon and eventually escape.
Gandalf's main reason for supporting Thorin's quest in The Hobbit was to eliminate the threat of the dragon Smaug, who would be a powerful ally for Sauron. Despite popular belief, the Balrog known as Durin's Bane was more powerful than Smaug in Middle-earth, being a literal, primordial demon.
What is the biggest creature in Lord of the Rings?
Ungoliant was very large, and became much larger after consuming the gems of Fëanor that Melkor stole from Formenos. She became so large that Melkor was afraid of her. But all of the information that Tolkien gave us leaves little doubt that Ancalagon was far larger than Ungoliant.
