Complex sentence: Geralt defeats Caranthir, the Hunt's navigator, and moves on to face off against Eredin in a fight and emerges victorious; however, the White Frost begins to descend on Skellige.
Split into simpler sentences: Geralt defeats Caranthir, the Hunt's navigator, and moves on to face off against Eredin in a fight and emerges victorious. However, the White Frost begins to descend on Skellige.