ew facts are known about the childhood of Grommash Hellscream. The only thing that's clear is that he became Chieftain of the Warsong Clan in his youth.

Under the command of Ner'Zhul, Elder Shaman of the Orc Clans of Draenor, Grom successfully led his people in many strategic hit-and-run raids, designed to retrieve some of Azeroth's most powerful magical artifacts.

After the destruction of their only passage home, and the successful vanquishing of the Orcish strike forces, Grom and the Warsong Clan were forced into hiding in the wilds of Lordaeron. They eked out an existence on the edge of human civilization, for nearly 15 years.

All of this time, Grom was forced to fight the demonic curse that had left him weakened and listless. Where other Orcs gave into this malaise, Grom fought it to the end of his days. As the number of free Orcs was diminished by conflict and old age, their situation looked more and more hopeless. The young and weak were unable to thrive in this harsh environment, and the day of reckoning looked to be closing in on the Warsong Clan.

Grom's trust in young Orc Thrall was rewarded, when the Warsong Clan was reunited with Orgrim Doomhammer and Thrall's lost clan, the Frostwolves. Together, they battled against the Human internment camps, and the two clans set about freeing and reinvigorating the Orcish nations.

A vision of Thrall's led the Orcs through the ocean, to the faraway lands of Kalimdor. After an episode of insubordination, involving attacks to the human settlements, Grom and his Clan were sent by Thrall to Ashenvale in a mission to clear land and gather lumber for the new Horde's camps. They soon got attacked and overwhelmed by the Night Elves, commanded by the powerful demigod Cenarius. The base Hellscream

 

had built in Moonglade was sacked, and many of the orc defenders killed.

One of Grom's troll witch doctors found a fountain of blood, filled with demonic energies. Grom didn't pay ears to warnings, and forced his troops to drink from it, along with him. This allowed them to defeat Cenarius' forces, but led them to a terrible discovery.

Pit Lord Mannoroth appeared. The fountain had been filled with his blood, and Grom knew that the demon, once again, had cheated and used the Orcs to get rid of Cenarius, and the price of the power they had gained would be the loss of their will and souls.

Turned into slaves, Grom and his Clan fought under Mannoroth command, against their former allies, the rest of the Horde led by Thrall, and the humans led by Jaina Proudmoore.

Determined to save his old friend, Thrall managed to capture Grom's essence in a special soul gem forged by Jaina. The soul gem was brought to the ritual circle where magic-users from both Jaina and Thrall's forces freed Grom from the Legion's control.

The final battle between Grom and Mannnoroth was epic, and the hit that destroyed the demon lord caused a massive explosion.

Grom was mortally wounded by the terrific energies unleashed by Mannoroth's

 

passing. His head held in his friend Thrall's hands, the burning flames of the demonic corruption were quenched. Grom turned to Thrall and told him he was finally free of the corruption that had stalked him for so long. Then his body surrendered to its wounds and Grom Hellscream died.

With his death, Grom redeemed himself and became a hero for all Orcs. With Mannoroth destroyed, the Burning Legion was no longer able to exercise any influence over the orcs. Truly, all who had ever consumed the blood of Mannoroth (or who were tainted by their chieftains doing so) owe the late Grom Hellscream a great debt.

In memory of his friend and comrade, Thrall rose a monument to Grom in the southwestern part of Ashenvale, located presumably at the spot he was slain in the aftermath of Mannoroth's death. The inscription reads as follows:

Here lies Grommash Hellscream, Chieftain of the Warsong Clan.
In many ways, the curse of our people began and ended with Grom. His name meant "Giant's Heart" in our ancient tongue. He earned that name a hundered-fold as he stood alone before the demon Mannoroth - and won our freedom with his blood.
Lok'Tar Ogar, Big Brother, may the Warsong never fade.


- Thrall, Warchief of the Horde

 

Sources:
http://www.wowwiki.com/Grom_Hellscream
http://www.worldofwconline.com/content/serverscentral-hellscream.php