The Great Destroyer

The Great Destroyer is the title of the enemy of the Great Dwarf, whose true name is said to be contained within the Tome of Rubicon. It is worshipped by at least some members of the Stone Summit, such as Hierophant Morlog. Its minions also include the Destroyers. No known depictions of the Great Destroyer have been observed, and there is insufficient information to determine whether or not the Great Destroyer is an alias of some other, named entity, however the Stone Basilica near where the Tome of Rubicon is buried bears a strong resemblance to the ruins in the Foundry of Failed Creations. The Great Destroyer has been confirmed to be the villain of Guild Wars Eye of the North.

Trivia
May be related to a Red vs. Blue episode where the 'Great Destroyer' comes and causes mayhem