The dragon (Beowulf) in the context of "Archenemy"

Grendel's mother (Old English: Grendles mōdor) or Mrs. Grendel is one of three antagonists in the anonymous Old English poem Beowulf (c. 700–1000 AD), the other two being Grendel himself and the dragon. Each antagonist reflects different negative aspects of both the hero Beowulf and the heroic society in which the poem is set. Grendel's mother is introduced in lines 1258b to 1259a as: "Grendles modor/ides, aglæcwif".

Grendel's mother, who is never given a name in the text, is the subject of an ongoing controversy among medieval scholars. This controversy is due to the ambiguity of a few words in Old English which appear in the original Beowulf manuscript. While there is agreement over the word "modor" (mother), the phrase "ides, aglæcwif" is the subject of scholarly debate.

Worm, wurm or wyrm (Old English: wyrm; Old Norse: ormr; Old High German: wurm), meaning serpent, are archaic terms for dragons (Old English: draca; Old Norse: dreki/*draki; Old High German: trahho) in the wider Germanic mythology and folklore, in which they are often portrayed as large venomous snakes and hoarders of gold. Especially in later tales, however, they share many common features with other dragons in European mythology, such as having wings.

Prominent worms attested in medieval Germanic works include the dragon that killed Beowulf, the central dragon in the Völsung Cycle – Fáfnir, Nidhogg (Old Norse: Níðhǫggr), and the great world serpent, Jǫrmungandr, including subcategories such as lindworms and sea serpents.

Smaug (/smaʊɡ/) is a dragon and the main antagonist in J. R. R. Tolkien's 1937 novel The Hobbit, his treasure and the mountain he lives in being the goal of the quest. Powerful and fearsome, he invaded the Dwarf kingdom of Erebor 171 years prior to the events described in the novel. A group of thirteen dwarves mounted a quest to take the kingdom back, aided by the wizard Gandalf and the hobbit Bilbo Baggins. In The Hobbit, Thorin describes Smaug as "a most specially greedy, strong and wicked worm".

Critics have identified close parallels with what they presume are sources of Tolkien's inspiration, including the dragon in Beowulf, who is provoked by the stealing of a precious cup, and the speaking dragon Fafnir, who proposes a betrayal to Sigurd. A further source may be Henry Wadsworth Longfellow's 1855 poem The Song of Hiawatha, where Megissogwon, the spirit of wealth, is protected by an armoured shirt, but whose one weak spot is revealed by a talking bird. Commentators have noted Smaug's devious, vain, and proud character, and his aggressively polite way of speaking, like the British upper class.

Tolkien's monsters are the evil beings, such as Orcs, Trolls, and giant spiders, who oppose and sometimes fight the protagonists in J. R. R. Tolkien's Middle-earth legendarium. Tolkien was an expert on Old English, especially Beowulf, and several of his monsters share aspects of the Beowulf monsters; his Trolls have been likened to Grendel, the Orcs' name harks back to the poem's orcneas, and the dragon Smaug has multiple attributes of the Beowulf dragon.The European medieval tradition of monsters makes them either humanoid but distorted, or like wild beasts, but very large and malevolent; Tolkien follows both traditions, with monsters like Orcs of the first kind and Wargs of the second. Some scholars add Tolkien's immensely powerful Dark Lords Morgoth and Sauron to the list, as monstrous enemies in spirit as well as in body.Scholars have noted that the monsters' evil nature reflects Tolkien's Roman Catholicism, a religion which has a clear conception of good and evil.