The Great Host
Called the Vast Horde, the Monstrous Plague, Destruction Incarnate, and several other choice words depending on who you talk to. The Great Host was a vast swarm of innumerable Giants, Dragons, Titans and other powerful monsters that swept across Tirstoc like a plague. They had no mercy, no remorse and seems almost possessed in the way they smashed or burned everything and everyone in their way. Normal beasts of the forest seemed the aid the Great Host, and in some instances the land itself seemed to rise against the Grand Union. As the Great Host neared the western edge of Tirstoc they abruptly stopped their advance and the entire army seemed to vanish back into the land that they had destroyed. Some of the more bestial humanoids, orcs and the like, remember being part of the Great Host but describe a detached feeling, as though they were watching while someone else controlled their actions.