The Servants of Chronos are giant monsters on Chronos's assisstance. They are minor villains in the animated series "Class of the Titans" and minor competitors in the early events of Disney vs Non Disney Villains War.
Disney Vs Non Disney Villains War
Pre War: Gods, Demons and Sorcerers
Prior to the events of the war, Chronos and his servants ally with Hordak and Narissa, on purpose to destroy Chernabog and his brothers, by taking over the Crystal of Darkness, the source of Chernabog's power. With it's power, they would rule the world.
Defeat on Bald Mountain
At thei arrival on Bald Mountain, Chronos confronts his son, Hades, one of the members of the Dark Council, whose purpose was the same with Hordak and Narissa but different as Hordak wants to seizes the crystall's powers for himself. As Chronos commanded his army to attack his son, Hades managed to fired with his powers one of his generals, while he called his pet, Hydra, to devour some of the troops of Chronos, leaving the others to flee from the battlefield as the angry titan dealt with his son personally.