Aesir

The Polar Gods are mysterious monsters used by Team Ragnarok in Yu-Gi-Oh! 5D's.

In the anime, the Polar Gods are currently the only DIVINE-Attribute, Divine-Beast-Type Synchro Monsters ever seen, as well as the first DIVINE-Attribute monsters of any kind since the Egyptian Gods. However, their attributes and types were changed in TCG and OCG. Polar God King Loki is a DARK Spellcaster, Polar God King Thor is an EARTH Beast-Warrior, and Polar God Sacred Emperor Odin is a LIGHT Fairy. Each member of Team Ragnarok possesses one of these cards.

History
Their names are Loki (left), Odin (center), Thor (right) and they are each named after the 3 top gods of the Norse mythology pantheon, being the God King Odin, the God of Thunder Thor and the half-Giant God of trickery Loki respectively. In Norse mythology, these 3 gods are said to form part of a huge battle known as Ragnarök in which they will die. They can be considered Polar Gods due to the prelude of Ragnarök known as Fimbulvetr, which is a time of three winters with snow coming from all directions without any summers between. During this time, there will be wars and brothers killing brothers. It should be noticed that in the norse mythology Tyr, the Vanquishing Warlord is also a god, but as a card he is a fairy type monster

In the anime, these cards were found in caves with tree roots surrounding their interior by the duelists they engraved the Rune Eyes upon. The roots in these caves are probably an allusion to the world tree of Norse Mythology, Yggdrasil.

Powers (anime)
The powers of these Gods rival that of the Crimson Dragon, as seen in Episode 118 when Thor clashed with Red Dragon Archfiend. Both monsters emitted a strange energy pulse, wreaking havoc around the dueling arena and drastically upsetting the weather outside the stadium.

These cards also protected Team Ragnarok and their memories from the Three Emperors of Yliaster's alterations of the timeline.