WoW: The Invincible History

Riding on the chill winds that flow around the frozen spires of Icecrown Citadel comes the once-noble steed of Prince Arthas Menethil. Now this beast, raised from its grave, bears the fearsome Lich King on its winged back.

The mare Brightmane gave birth to Invincible as a young Prince Arthas watched with rapt attention.The stallion's coiled muscles were made for speed, and Arthas often felt that his mount flew rather than galloped across the countryside. With the slightest touch of his heel, Arthas was able to convey his directions, and Invincible obeyed without question or hesitation.

It was Invincible's unfaltering faith in his master that inevitably led to the stallion's death and unholy rebirth. On a cold winter afternoon as snow was blanketing the ground, Arthas was desperate to get away from the city even if it meant riding through harsh and unforgiving weather. Once outside, Arthas guided Invincible over a familiar jump, but the stallion slipped on slick ice, and the fall shattered his forelegs. With no way to save his companion, Arthas was forced to give Invincible a merciful death, and the prince carried that guilt with him for a very long time.