Unable to see things behind itself, the monster had the joints of its legs being wounded by Lily and Kate's attacks. When the beast tried to run around, Billy fired a Fireball toward the left side of the monster's face. The beast glared at him, and then the others began to attack as usual.
Billy focused again and then created another ring of fire on the remaining arm of the right side of the monster. The creature panicked because if it loses that army as well, then it will be completely wide open on one of the sides. The monster decided to do something ridiculous. It jumped and then put its arm below itself. That would cause some damage, but it was better than losing another limb. However, Billy had an idea… to make the flames cause even more damage. He made them spin. In the end, the monster extinguished the flames, but Billy could see a nasty wound on the arm. He had a target, and the beast barely could make it move.