Valkyries
The Valkyries are a powerful race of Demi-Goddesses, who scout battlefields for honorable powerful soldiers and then take their souls to Valhalla where they are brought back to life and train for the final world battle.
Titans
A race of powerful God-like beings who ruled the world in ancient times. Approximately 1000 BC, the Elders saw the Titans as a risk to the world and themselves. However, by this time the Titans were so powerful they couldn't be vanquished. With no other option, the Elders released a vapor that turned several mortals into . With this new power, the Gods were able to entomb the Titans in ice and end their reign of terror.