Mysterious sound

When Drake Dragon opened his eyes again, he didn't know how much time had passed, maybe an hour, maybe a day. Because he was awakened by the howler monkey's drum-like sound. When he looked at his body, he saw that the blood had already coagulated on many wounds. This was also thanks to the coagulation of the wounds, otherwise he would have bled to death. He stood up slowly, felt dizzy and almost fell down again. After hugging the big tree next to him for a while, he felt a little better. He looked...