However, as the Blood Wolf Demon Drum's aura steadily grew stronger, Lu Xiaotian discovered that the color of the little blood-colored wolf head was continuously darkening.
Lu Xiaotian continued flipping through the secret manual on the Blood Wolf Demon Drum. On its final few pages was also recorded the method for refining blood crystals. They were made from the blood and bones of high-grade demon beasts. The higher the demon beast's rank, the greater the blood crystal's power, and the greater the destructive force wielded by the Blood Wolf Demon Drum.
What a wicked talisman spirit artifact. Lu Xiaotian was secretly alarmed. In particular, the method of creating these blood crystals required demon beast blood—and it could not be taken from a dead demon beast. It had to be drawn while the beast was still alive, then refined through a secret art to form a blood crystal.
The higher the demon beast's rank, the greater the power contained within the blood crystal. Yet this method was far too vicious; it was tantamount to torturing a demon beast alive. Had the blood crystals in the hands of that triangular-eyed old man not been insufficient to bring out the Blood Wolf Drum's full power, Lu Xiaotian's victory would never have come so easily. It would likely have been a bitter battle.
Talisman spirit artifacts truly had their own remarkable strengths. Lu Xiaotian rested his chin on his hand, a thoughtful look appearing in his eyes. The process of refining blood crystals was quite difficult and also extremely time-consuming. It seemed this thing would only be usable once or twice for him.
All of a sudden, a blue light flashed at the cave entrance and passed through the restrictions in the blink of an eye. It was the sound transmission talisman he had