Complex sentence: Connacht is believed to have come from the Eastern land of Gower at the same time a comet appeared in the Western skies, and was the first human in a thousand years to face the Myrkridia in battle and survive.
Split into simpler sentences: Connacht is believed to have come from the Eastern land of Gower at the same time a comet appeared in the Western skies. Connacht was the first human in a thousand years to face the Myrkridia in battle and survive.