How do my world evil spirits fight my world killing evil spirits

How do you kill my evil spirits? Many players don't know much about this, but don't be impatient. The following system is a series of tips and tricks for you to share with you. I hope everyone can enjoy it.
Because it will fly, it is still very high. The evil spirit will fire a fireball. And the fireball damage is high. But you can use the projectile to bounce the fireball. Empty hands or other objects can also be used. It seems that there is no trick at killing the evil spirits. You can only avoid the fireball by the coquettish position, but you have to use the object to bounce back. The fireball of the evil spirits can destroy some squares that are not resistant to bombing. So you'd better put some round stones around Hell's Gate to protect the Hell Gate.