The Spade Kingdom 「スペード王国 Supēdo Ōkoku」 is a country near the Clover, Heart and Diamond Kingdoms. The current rulers are the Dark Triad and are in a hostile relationship with their neighboring countries.
The Spade Kingdom lies west of the Clover Kingdom. This country of winter and fog has the largest landmass of the four major kingdoms. According to Julius Novachrono, the country serves an ancient evil that sleeps in its land.
Like the Diamond Kingdom, the Spade Kingdom has been extending its influence into the vast neutral zone separating the countries in their attempt at expanding their borders and spearhead their likely attempts to conquer the other neighboring kingdoms.
The government of the Spade Kingdom is also unique in comparison to its neighbors. Instead of being ruled by a singular monarch, such as a king or princess, the Spade Kingdom is ruled by three powerful mages known as the Dark Triad, who deposed of the kingdom’s original ruling family, House Grinberryall, and have since proven themselves to be tyrannical and cruel dictators to their country, as seen when they completely allow their soldiers to heavily abuse the citizens with weak magic power and use them as literal disposable human power sources for their mobile fortresses during their war campaigns and military operations.
Currently, the triad have made several hostile invasions toward their neighbors, having successfully conquered the Diamond Kingdom and sent a squad of their Mages in an attempt to invade Heart Kingdom, and, in expectation to this, the current Queen of the Heart Kingdom has officially aligned herself with the Clover Kingdom in order to repel their invasion and defeat the devil that currently resides within their lands.
Later it was revealed that the overall Military Strength of the Spade has grown exponentially since the Triad took over with several members of their Military being noted have obtained monstrous boosts of powers due to the Triad now employing devils to boost their soldiers' abilities, as seen during their Invasions of the Clover Kingdom where two Dark Disciples of the Triad were able to easily defeat and slaughter half of the Clover Kingdom's strongest Magic Knight Squad units the Golden Dawn overall members and later during their Third Invasion of the Heart Kingdom, the six direct subordinates of Vanica were all noted have magical power equivalent to that of Arcane Stage Zero magicians.
Later during Zenon's invasion of the Clover Kingdom and the attack on the Golden Dawn Magic Knight Squad and abduction of William Vangeance one of the Clover Kingdom's most powerful magic knight captains and a Stage Zero Mage, it was made clear that one of the Spade Kingdom's primary goals is to further increase their national military power by abducting powerful magic users and forcibly recruiting them into the Spade's military even if it means stealing them from their neighbors, as confirmed by Zenon Zogratis, Dante, and Vanica of the Dark Triad, the latter of whom noted that one of her primary duties given to her by Dante primarily involved her looking for and "acquiring" Arcane Stage Mages and bringing them back to the Spade Kingdom. Later, Dante launched another hostile attack on the Clover Kingdom by targeting the Black Bull Magic Knight Squad in order to acquire the Arcane Stage Mage, Yami Sukehiro.