Lindworms

Lindworms are Dragons who live at the roots of the world tree, Yggdrasil.

Magnus Chase and the Gods of Asgard

Magnus Chase was fighting Lindworms in Hotel Valhalla with Thomas Jefferson Jr., Mallory Keen, Halfborn Gunderson, and new einherji Alex Fierro. However, Grimwolf, one of the oldest lindworms, suddenly appears on the battle field. Alex suspects that Loki sent him here and cuts its head off with her garrote while Magnus distracted Grimwolf.

Lindworms were the size and lengths of eighteen-wheelers. They only have two front legs and leathery brown bat-type wings.

Lindworms looks like George R.R Martin's dragons from A Song of Ice and Fire.
While lindworms in the books have wings, the original mythology portrays them as just snakes with arms.
It's supposed that they could be controlled for Loki, as Alex suspect that he sent him. If that's true is probably possible be Loki is the god of snakes & serpents (and fire wyrms sometimes) soo, possibly can include him as god of lindworms of dragons too. Althought, supposedly he not are immune to they's venom.

Magnus Chase and the Gods of Asgard
Core Series:	The Sword of Summer \| The Hammer of Thor \| The Ship of the Dead
Main Characters:	Magnus Chase \| Alex Fierro \| Blitzen \| Halfborn Gunderson \| Hearthstone \| Loki \| Mallory Keen \| Samirah al-Abbas \| Sumarbrander \| Thomas Jefferson Jr.
Secondary Characters:	Randolph Chase \| Gunilla \| Natalie Chase \| Amir Fadlan \| Alderman
Minor Characters:	Annabeth Chase \| Frederick Chase \| Helgi \| Hunding \| Vala \| Junior \| Lars Alhstrom \| Stanley \| Inge \| Percy Jackson \| Stan \| Alviss \| Miles \| Wildflower \| Sunspot \| John Henry
Norse Gods:	Freya \| Thor \| Balder \| Ullr \| Frey \| Odin \| Heimdall \| Vidar \| Sif \| Frigg \| Tyr
Minor Gods:	Skírnir \| Mimir \| Ran \| Hod \| Hel \| Sigyn \| Aegir \| Nine Billow Maidens \| Njord \| Kvasir \| Holler \| Forseti \| Glum \| Lofn \| Sól \| Idunn
Jotnar:	Surt \| Gerd \| Norns \| Utgard-Loki \| Harald \| Ymir \| Geirrod \| Gjalp \| Greip \| Thrym \| Thrynga \| Tiny \| Little Billy \| Hrungnir \| Red \| Tattoo \| Gunlod \| Suttung \| Baugi \| Skadi \| Hrym \| Eggther \| Norns
Monsters:	Jormungand \| Ratatosk \| Vedrfolnir \| Nidhogg \| Fenris Wolf \| Lindworm \| Wight \| Brunnmigi \| Siersgrunnr \| Garm
Magical Creatures:	Dwarf \| Elf \| Sleipnir \| Stanley \| Marvin \| Otis \| Hulder \| Nøkks \| Vatnavaettir \| Nisser \| Troll \| Raven \| Hugin and Munin
Related Content:	Rick Riordan \| Hotel Valhalla Guide to the Norse Worlds \| 9 from the Nine Worlds

Monsters
Species:	Amphisbaena \| Apollo's Cattle \| Blemmyae \| Basilisk \| Carnivorous Sheep \| Centaur \| Cyclops \| Cynocephali \| Dragon \| Drakon \| Empousa \| Eurynomos \| Feather-Shooting Bird \| Fire-Breathing Horse \| Flesh-Eating Horse \| Gegeines \| Geminus \| Giant Eagle \| Giant Scorpion \| Giant Snake \| Ghoul \| Gorgon \| Gryphon \| Harpy \| Hellhound \| Hippalektryon \| Hippocampus \| Hydra \| Hyperborean Giant \| Ichthyocentaur \| Karpoi \| Katobleps \| Keres \| Khromandae \| Laistrygonian Giant \| Leucrotae \| Lycanthrope \| Makhai \| Merperson \| Myrmekes \| Nikai \| Pandai \| Pegasus \| Pit Scorpion \| Satyr \| Scythian Dracaena \| Sea Serpent \| Siren \| Strix \| Stymphalian Birds \| Tauri Sylvestres \| Telekhine \| Troglodyte \| Unicorn \| Vrykolakai \| Yale
Friendly Monsters:	Argus \| Blackjack \| Briares \| Bombilo \| Chiron \| Cottus \| Don \| Ella \| Festus \| Gleeson Hedge \| Gray \| Grover Underwood \| Guido \| Gyges \| Lysas \| Mrs. O'Leary \| Ophiotaurus \| Peaches \| Peleus \| Porkpie \| Rainbow \| Scipio \| Tyson \| Tempest \| Sssssarah
Enemy Monsters:	Antaeus \| Agrius and Oreius \| Arachne \| Cacus \| Carthaginian Serpent \| Charybdis and Scylla \| Chimera \| Chrysaor \| Clazmonian Sow \| Colchis Bulls \| Echidna \| Euryale \| Geryon \| Kampê \| Karkinos \| Kekrops \| Lamia \| Manticore \| Medusa \| Minotaur \| Nemean Lion \| Polyphemus \| Python \| Skolopendra \| Sphinx \| Stheno \| Sun Dragons \| Typhon \| Trojan Sea Monster
Neutral Monsters:	Cerberus \| Erymanthian Boar \| Gray Sisters \| Furies \| Ladon \| Orthus \| Sybaris