This canyon is famous for being the site of a titanic clash between the demonic pit lord Mannoroth and two orcs: Grom Hellscream and Thrall. Although the pit lord succeeded in knocking Thrall out, he was not quick enough to escape Grom's axe, which cleaved into Mannoroth's chest. The demon's death created an explosion of fire and light which tore the life from Grom. A memorial stone has since been erected in Grom's memory, and it stands to this day in the canyon amidst hostile lesser demons.
An inscription reads:
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 hundred-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