Lucius Zogratis / Time Devil

Lucius Zogratis is the eldest of the Zogratis siblings and the true main antagonist of Black Clover. He was bonded with the Time Devil Astaroth, one of the three supreme devils alongside Lucifero and Beelzebub. Lucius possesses the ability to manipulate time and soul magic, which he combines to rewrite people's souls and transform them into purified beings under his control. His ultimate plan is to create a world of perfect peace by converting all of humanity into immortal, purified beings — essentially removing free will in the name of salvation. He views himself as a savior rather than a villain, making him one of the most dangerous antagonists in the series.