The strongest beast yet
Although it might have looked as if Fex had just fled at the first sign of the Demon tier beast waking up, the vampire had done something before his strategic retreat. He had carefully timed it so his red aura string would shoot out wrapping around the dragon's legs, buying the rest of them additional time.
While running, he was also leaving behind several needles on the ground with string attached to them. As long as he used his blood control, he could make the string rise and wrap around the beast's legs.
Unfortunately, the effectiveness of that was vastly limited. As soon as the dragon stood up on all of its four legs, it immediately snapped as if it wasn't even there in the first place.
"These days as the beasts we fight get stronger and stronger, it's like my string is becoming more and more useless. Isn't there any way to increase its strength?' Fex wondered, but now was clearly the wrong time to think about anything but the Demon tier beast on their heels.