Complex sentence: Before he has a chance to find the Moorwen, Kainan, dubbed the "Outlander", is captured by a Wulfric; a Viking warrior, and held prisoner in the local village led by King Hrothgar.
Split into simpler sentences: Before he has a chance to find the Moorwen, Kainan is captured by a Wulfric a Norse warrior, who dubs him an "outlander". Kainan is held prisoner in the local village led by King Hrothgar.