Dragon Quest: Tale of Heaven

Manga based on Dragon Quest V. A boy traveled the world along with his father, Pankraz. After the death of Pankraz, he is a slave forced to undergo hard labor in the building of a temple. Ten years later he finally escapes and starts a journey to find his mother, who is said to have died soon after he was born. She came from Elhaven and hence had the power to tame monsters.