Sarcophagia

Sarcophagia is an Equestrian sphinx from the land of Sphinxia. After his race's proposed extinction after the actions of Somnambula against Egyptia, Sarcophagia aimed to use forbidden arts to save his race after they slowly start dying with the use of a soul-stealing relic called the Deity Alabaster to get godly power, but when Pharaoh Plague and the people collectively refuse to do so and punish him by putting him in a mummified hibernation, they die out anyway and when ponies accidentally unearth him from his tomb, he sees the damage done to his race and swears to restore them with the Alabaster. But by stealing too much power, he could be overcome with a god complex and become mad with power, instead opting to use the Alicorn God souls she sought to instead reshape Equestria by destroying and rebuilding the worst of it.