Monsters must reach level four, be given foods they like, and also a weapon before they will assist Yangus, and as they fight more and more, they will combine their strengths with other captured monsters.
当怪物达到4级，得到它们喜欢的食物并拥有武器后，才会协助杨格斯，随着战斗次数的增多，它们就能将自己的力量与其它捕捉怪物的力量进行联合。