Gatekeepers (TKADS)

The Gatekeepers are powerful Armoured Figures dubbed in Ancient Stories "to hold the Gates of the Dervarian Empire against enemies", they were the most powerful weapons in their arsenal and the five strongest had their powers locked behind the Keyholes of the World, it was revealed that they were designed for the modern day awakening of Dervarian Emperor: Magnus Dervarian.

The Keyblade War
Despite the Yalesian Empire having powerful Ancient Magic and the Light of Kingdom Hearts to aid them, the Dervarian Empire had the Hordes of the Dark Realm and equally powerful Dark Magic in which they could call upon to counter the light-hearted counterparts, soon enough the Empires had fallen into a stalemate where victories and losses came and went by the day.

It was during this period that the Dervarian Empire their secret Doomsday weapons: The Gatekeepers, 7 meters tall giants that were powered by the Power of Hearts and the Darkness it contained. The Gatekeepers almost bled the battlefield dry, killing any of the Yalesian Empire that got in their way, bringing the Yalesian Empire almost to its knees. Through a trick, Dervarian Emperor Magnus Dervarian was sealed away along with his Doomsday weapons, unfortunately a number of Yalesian Sorcerers were also killed in the effort and to make matters worse the Empress of Yalesian was mysteriously murdered.

Both nations soon came to an end without the guiding force behind them, both armies fought on, but due to internal corruption inevitably destroyed each other.