Defeat Flame Teeth Banzul and obtain Hearts of Banzul in Firepath of Tamuz. Return to the Foreigners' Camp and talk to Abel Tazares. Use your quest tracker to see your progress.
Abel Tazarez: How was fighting with Flame Teeth Banzuls? NakanoAzusa: They were stronger than Saw Headed Banzuls. Abel Tazarez: Yes. But they're the same species. HiiragiKagami: They were a different color! Abel Tazarez: They change based on where they live. Abel Tazarez: The difference is really in their heart. NakanoAzusa: Their heart? How is that different? Abel Tazarez: An unusal drug was injected. They have a bigger Abel Tazarez: heart than ordinary Banzul. Larger hearts provide Abel Tazarez: more power. Of course I didn't observe it myself. NakanoAzusa: Really? Abel Tazarez: Yeah... I read it in a book. I'm curious what Abel Tazarez: kind of drug was injected. NakanoAzusa: Do you want me to get some for you? HiiragiKagami: Oh~ will you ever stop asking for trouble... Abel Tazarez: If you can do that I would appreciate it. Abel Tazarez: But this is only for my own curiosity... NakanoAzusa: It's alright. We need to cooperate. I'll bring NakanoAzusa: Banzul hearts back to you. Just wait here. Abel Tazarez: Why, thank you very much.