Evil spirits mostly work by putting thoughts and ideas in the mind of a person and stirring up their desires. They can also effect changes in their physical bodies, mostly sickness. They can make a person exhausted or tired.

When an evil spirit gains control of the persons will, it enables them to control a person's choices and manipulate their body.

Some spirits prefer to remain detached. They can then move from person to person and have a go at them all at the same time. A deceiving spirit might find this a convenient way to operate, because they could deceive a group of people moving around them and planting the same lie in them all, so they are deceived together.

Evil spirits can move from person to person. They are always looking for an opportunity to do greater evil, so if they see a better opportunity in another person, they will take it, and enter them. Of course, if they have control of a person's mind, they may be reluctant to leave, because they do not know if they will be able to get control of a new person. There are benefits for them in having control, but they are free to go to another person, if they think they can benefit.

In principle, a person can deliver him/herself if they renounce the spirit and command it to leave in Jesus' name. However, it is really hard to do on your own, especially if the spirit has control of your will. It can give thoughts that confuse its victim, making it hard for them to resist it. That is why it often better to have two or three people praying against the evil spirit.

Jesus promised that there is greater authority when two or three are praying together. However, the key to deliverance is the victim renouncing the right of the spirit to be there. Once the evil spirit loses the authority that they have over their victim, they have to go. Of course, they will try to get their place of authority back, by tempting the person to fall into sin again, so it is good to have other people praying for the victim and encouraging and supporting them.

Similar Powers but Different Roles

I think that evil spirits are mostly the same as each other. When they were created, they were all the same, and there was no hierarchy amongst them, but after the fall, they established roles and a hierarchy to go with it. They get a role when they discover a particular way of operating. Some spirits developed a skill at promoting a particular sin, so that gives them a name. Others get a place in the hierarchy of spirits that gives them additional power and authority. This place establishes their role.

Angels and evil spirits are followers. They listen to the closest voice and do what they are asked to do. Without the wisdom of the Holy Spirit, evil spirits are cut off from the wisdom that angels need to operate effectively. The Holy Spirit ensured that they worked together in unity. Cut off from his wisdom, evil spirits fall into disunity and struggle to escape it. They only way that can avoid disunity and confusion is by forming hierarchies and allowing themselves to be bullied by the spirit that leads the hierarchy.

These groups and hierarchies are always fluid, because spirits are always rebelling against their leaders, and trying to take their place.

Government-spirits

Government-spirits are often called "principalities and powers", but those names do not explain much, so I prefer to call them what they are. A government-spirit controls the leaders of a city or nation. It get controls by leading a group of spirits that work in the hearts and minds of the leaders. These spirits would include spirits of pride, control, love of power, anger, etc. They submit to the government-spirit for the benefit of getting to manipulate a nation. This gives the government-spirit great power.

A government-spirit leads a gang of spirits and uses them to control the political leaders of a nation or city. They will use whatever will work with the particular leaders they are trying to control. Spirits encouraging pride, love of power, control, hatred, anger and deception will often be part of the gang.

When a government-spirit is spiritually defeated, it will keep on trying to be a government-spirit without any success, because it has lost the supporters, who made it powerful. It will mope around talking about its past glories, but totally confused about how it might get its power back. This forlorn spirit will become powerless and feeble.

Destroyer-spirits

Destroyers-spirits are spirits who love destroying things. They have developed skills in stealing, destroying and killing people and things. They form gangs with a leader who is the best destroyer rising to the top. This destroyer leader looks for opportunities for the gang to do its evil work.

The destroyer leader forms a gang of destructive spirits to work together and take the destruction of God's creation to a new level. It becomes their leader, because it is the most ruthless and effective at destroying things. Once spirits join his gang, they are afraid to leave, because the leader is so ruthless and violent. The destroyer leader looks for opportunities for his gang to do its stuff. Whenever there is big violence going down, they will be there. They enjoy murder and any other kind of destruction that they can think of.

The book of Revelation describes a spirit called Abaddon (Destroyer), who is released from the abyss, to bring some terrible destructions on earth. The gang of destroyer spirits he leads attempt to destroy and kill everything. They try to destroy God's created world. Wrecking rivers and seas, and destroying the land. They also attempt to kill and torment people by inflicting them with sickness and starting destructive wars.

Abaddon had tried to destroy the earth at the time of the flood, but was restrained.

Leaders of destroyer spirits will often join them up with Gog because he provides good opportunities for violence and destruction.

Gog

A spirit called Gog is described in Ezekiel 38,39 and in Revelation 20. I assume that Gog is a spirit who has developed a skill at commanding big groups of government-spirits to work together to do evil. They commit to following him, because he offers them opportunities to enhance their power. He uses violence and power to keep them in line. If one tries to pull out of an alliance, Gog would set destroyer spirits against it. Of course, if they all rebel against his leadership, he would be powerless to keep them in line.

These spirits are all using stolen authority, so they are always vulnerable, because their power over others depends on them being more violent, or more clever than those they control. Other spirits will always be stepping up to have a go against them.

This is why the spirits in control have changed throughout history. Satan (Accuser) has had times on top, but Death and Destruction have been on top at other times. I guess Gog will have a time on top of the heap, but it does not last.

Weapons of Angels

Angels work together in unity, so they usually outnumber the evil spirits, who are always competing with each other. The angels are guided by the Holy Spirit, so they always know exactly what to do. Their main weapon is words. Due to the cross, they have authority on their side. If the people they are working with have submitted to God's will, then together they have authority over any evil spirits that are attacking. They can speak to them and tell them, "You are not allowed to do that", and they have to obey.

Angels also have the power to restrain spiritually evil spirits. It is hard to imagine what that is like without thinking in physical terms. It seems they can offer spiritual restraint. For example, at the flood, some evil spirits were locked up by the holy angels in a spiritual prison (1 Pet 3:19).

God sometimes get his angels to disguise themselves as deceiving angels and pretend to be evil spirits. Evil spirits are mostly followers, so they are not very creative or clever. They just keep doing the same things over and over again. The angels have the creativity of the Holy Spirit behind them, so they can come up with creative new ideas, that really appeal to the evil spirits. They adopt these ideas, because they like them, but do not realise that they will actually benefit.

Deceiving angels can easily stir them up to attack nations that are opposing God, because destroyer spirits like the idea of attacking and destroying other nations. They think it will give them greater power, but don't realise that the same thing will happen to them, and they will all be defeated.