Malefor

Malefor: The dragon ruler of hell who legend says will create a new world, by destroying the current one

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Malefor, based of Satan from Christainity, was the first of the Purple Dragon kind. (Though he says that they have been many before him.) Seeing his extraordinary potential, the Dragon Elders taught him how to master the elements, but his power was unlimited and he consumed everything. Fearing his malevolence and his ambition, the Dragon Elders banished Malefor, but it was too late, he was already corrupted. Malefor then recruited an army of Apes, with the intent of destroying the world. As he led his army, the evil dragon taught the Apes to harness the power of the Gems, which are the dragon's lifeforce, and used them against the dragons race.

Malefor waged war against the Dragon kind for many years, slaughtering hundreds of thousands people to fulfill his "quest." His evil power tore open his own base of operations, the Mountain of Malefor, turning it into the Well of Souls: a chasm to the Underworld where all the souls of the malevolent dead people were sent, submitted to his influence. Malefor was ultimately defeated by the Dragon Elders, who imprisoned his spirit in the Well of Souls and his essence in Convexity. However, his armies survived and went into hiding, waiting for an opportunity to set the Dark Master free again. However, legend tells of a purple dragon who will end Malefor's reign of terror forever.

Malefor is now the very embodiment of Evil and Darkness of the Legend of Spyro universe, as every malevolent spirit in the Well of Souls is under his command. He has complete control over Evil, including the smallest bit within someone's soul. His ultimate goal is to destroy the world in a "great cleansing". It can be guessed that he wants to build a new one following his own ideals and rule with an iron fist.

Eventually he was released in a demonic ceremony called the Eternal Night. He wasted no time after being freed and set in motion the chain of events to end the world. Malefor eventually was confronted by Spyro, the dragon destined to defeat him along with Cynder, a former servent of Malefor. Together, they defeated Malefor and sealed him away forever.(From Spyro Wiki)