This is an animated sequence that plays when you've cleared the final story quest of Esfera. In this sequence it is shown that the Black Mage has finally fused with the sun of Esfera and the moon through the power of the transcendent of light, Aiona, allowing him to combine his powers even beyond a transcendent.

Because of the fusion, the Black Mage is now reborn a transcendent of two worlds aiming to destroy the current world with its dark power only to rebuild a new world with the power of light.
That is also the true purpose of 'the ultimate light can only be found in the ultimate darkness' as said by the Black Mage himself. Now begins the real finale. - That was the final sentence of the story.