Stream anime episodes online for free, Watch Slayers Next Episode 4 English version online and free episodes. Anime Episode guide, Chapter Slayers Next Episode 4 English dubbed An Ancient Pledge! One Who Seeks Immortality! After Tarim and Demia get put into Jail, Lina and the others decide to pay them a visit to enquire about the simultaneous summoning of the beasts from both houses. They’re told that the only person they know who could perform such a spell would be Halciform, who was once working on research into immortality.