Leviathan (legion)

This takes place in the Farol lake on the land of Farol

Before the man divide into races, people spoke with the ancient language that bound by magic. Living a boy and his mother as shepherd, the boy name is Aiur and Fiola his mother. They usually feed their sheep in meadow near their home, where it safe. One day, they were wandered to far away, they went to lake when horde of wolf living. When they attacked by the wolf, the mother jump to the lake and transforms into Sea serpent-like, that guard the lake till this day. The monster could blast water from it mouth and shake the ground with it tails. It name same as the island had, from the mother name; Farol.

In the other way, Aiur transform into something more smaller and agile, wandering the world alone.