I Am the Savior of the Demon Clan but I Have Angel Wings

Wang Ye, a social animal who died suddenly in 996 in his previous life, was reborn in the Magic Continent but was abandoned. He was picked up by a civilian couple and grew up safely until one day when he was helping his neighbor put out a fire - he sprayed out holy light from his left hand to put out the fire, and black mist came out from his right hand to demolish the house. Before he could figure out the bloodline of this "dual-card dual-standby", he was caught on the spot by Liata, the traveling demon sister: "Welcome back, young master! Your dark king's blood is enough for the revival of the demon clan... Wait, why is there white light behind you?!"