Stream anime episodes online for free, Watch Slayers Next Episode 20 English version online and free episodes. Anime Episode guide, Chapter Slayers Next Episode 20 English dubbed No Other Choice! Set Course for Dragon Valley! After barely escaping from Garv, Lina’s party heads to Dragon Valley in Catart mountain range to find a copy of Claire Bible. They meet a boy who offers to lead them to the valley. They get to the valley with him to meet the old head of the Dragon tribe, Milgasia. Xellos asks him to take them to the Bible, so he does, but Garv’s monsters attack them again.