Fire Emblem: The Sacred Stones

The lords are Eirika and Ephraim, the game develops in Magvel, which was inhabited by monsters, but people sealed their evil forces in 5 sacred stones, that later served as relics of the 5 royal families of the continent.
Now, all begins when the Grado Empire tries to dominate the entire continent by releasing the dark forces sealed in the sacred stones. As such, Grado attacks Renais, who don't have many chances to win, and so the King Fado sends Seth to escort Princess Eirika and thus seek help from the neighboring kingdom, the Kingdom of Frelia.

• Introduction of the game:
"In an age long past... evil flooded over the land. Creatures awash in the dark tide ran wild, pushing mankind to the brink of annihilation. In its despair, mankind appealed to the heavens, and from a blinding light came hope.
The Sacred Stones. These five glorious treasures held the power to dispel evil. The hero Grado and his warriors used the Sacred Stones to combat evil's darkness. They defeated the Demon King and sealed his soul away within the stones. With the darkness imprisoned, peace returned to Magvel. But this peace would not last..."