The Dauntless (ドーントレス Dōntoresu) are a series of cards that include "Dauntless" in its card name exclusive of the Kagero clan. They were first introduced in the Booster Set 11: Seal Dragons Unleashed, and gain further support in Booster Set 14: Brilliant Strike.
Dauntless Drive Dragon is...
One of the oldest soldiers in the empire who has been around since the time of the First Emperor. Desiring to become stronger than anyone else, even though he is a passionate dragon warrior, as the years pile themselves on top of him, he grew weaker. So, he chose to retire to the sacred mountains at the age of 4000, and sealed his body away. However, this seal was shattered by the appearance of an unexpected group of visitors called "Link Joker". After awakening from the attack, and having been kicked about by the invaders' vanguard team, this tenacious dragon, with the title of "Dauntless Drive", was assigned to "Kagero". The fighting spirit of this ancient general continues to fire up the spirits of those who would waver. Someday soon, the invaders will be sorry. That they awoke the immortal soldier who fears not despair.
Dauntless Dominate Dragon "Яeverse" is...
This is "Dauntless Drive Dragon" after being twisted by the power of the avatar of Void, "Link Joker". Influenced by "Reverse", its fearsome personality to pursue victory and power was revived. Hearing that a squad of "Kagero"'s rookies was ambushed, it rushed to the battlefield alone, disregarding its subordinates' advices. However, what awaited it were the cruelly demolished rookie squad and "Chaos Breaker Dragon", who was delivering the fatal blow to the last rookie. The old general charged, roaring as if it was crying, but this was in fact the trap of the Clown. Locked by thousands of hidden soldiers, its torn heart was implanted with "Void".
Even in the end, this dragon was not bent to desperation. Those who could become strong in the future were killed meaninglessly---the dauntless dragon could do nothing but to kneel down before such a sorrowful scene.
List of "Dauntless" Cards
List of Dauntless Support