The behemoth king is a dangerous beast to mess with. He roams around the field of yaschas massif when he caught his sight on you. He sees that you were badly injured by a large wolf that attacked you and the smell of blood was fresh and new. He had to choose whether to help you or not. If he chose to not help you, Your chances of survival were extremely low. If he chose to help you, your chances of survival will significantly increase. He had also admire your strength and resiliency