TITLE :Fighting Souls! Polar God King Thor VS Scar-Red Nova Dragon is the one-hundred and twenty fifth episode of Yu-Gi-Oh! 5D's.

DESCRPTION :Jack and Dragan fight each other, betting their pride on the line. Jack's Ace Monster, Red Dragon Archfiend, is destroyed when Dragan summons Thor. Jack is forced into a defensive position in the presence of Polar God King Thor, resulting in his Life Points dropping to 900. At that point, all seems over for him, however, Jack's wild fighting spirit refuses to back down. And in this raging battle, he performs a Double Tuning, summoning Red Nova Dragon!