The bible is very clear about shamans. From
What does the Bible say about necromancy?
"In the Bible, necromancy is also called divination, sorcery and spiritism and is forbidden many times in Scripture (Leviticus 19:26; Deuteronomy 18:10; Galatians 5:19-20; Acts 19:19) as an abomination to God. It is something that the Lord speaks very strongly against and is to be avoided as much as any evil. The reason for this is twofold.
First, necromancy is going to involve demons and opens the one who practices it to demonic attack. Satan and his demons seek to destroy us, not to impart to us truth or wisdom. We are told that our enemy the devil prowls around like a roaring lion looking for someone to devour (1 Peter 5:8). Second, necromancy does not rely on the Lord for information, the Lord who promises to freely give wisdom to all who ask for it (James 1:5). This is especially telling because the Lord always wants to lead us to truth and life, but demons always want to lead us to lies and serious damage."
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What does the Bible say about necromancy?
There is only ONE way to get rid of demons. That is through faith in Jesus Christ. Only through Jesus does the enemy run away in fear. I highly recommend the book The Bondage Breaker by Neil T. Anderson for more information. He will help you identify the areas in your life where you have allowed footholds for the enemy. He has great prayers, as well.
Here is a fascinating account in the bible about what Jesus said about driving out demons. Not that this is your situation, it's just that there are so many examples of attacks by the enemy throughout the bible.
Matthew 12:43-45(NIV)
43 When an impure spirit comes out of a person, it goes through arid places seeking rest and does not find it. 44 Then it says, I will return to the house I left. When it arrives, it finds the house unoccupied, swept clean and put in order. 45 Then it goes and takes with it seven other spirits more wicked than itself, and they go in and live there. And the final condition of that person is worse than the first. That is how it will be with this wicked generation.
This might just be your wake up call. It was for me. I was tortured by the enemy for many years. If I only would have known the power we all can have through Christ Jesus, it would have saved me and my family a lot of pain. I always saw the bible as an out-dated dusty book. That is exactly how the enemy wants us to see it. The bible is God-breathed and ALIVE. It will give you all the information you will ever need to live a good life here on earth. I can't tell you enough how having the Holy Spirit inside of me fills me with unending joy, peace and bliss. It was scary to take the initial step, but I'm alive now through Christ and I thank God every day for reaching out to me.
As a Christian, we are still going to face attacks by the enemy at Paul tells us in Ephesians 6: 10-18.
The Armor of God
10 Finally, be strong in the Lord and in his mighty power. 11 Put on the full armor of God, so that you can take your stand against the devils schemes. 12 For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. 13 Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand. 14 Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness in place, 15 and with your feet fitted with the readiness that comes from the gospel of peace. 16 In addition to all this, take up the shield of faith, with which you can extinguish all the flaming arrows of the evil one. 17 Take the helmet of salvation and the sword of the Spirit, which is the word of God. 18 And pray in the Spirit on all occasions with all kinds of prayers and requests. With this in mind, be alert and always keep on praying for all the Lords people.
Sending prayers for strength and clarity as you fight this battle. Don't forget that the enemy works hard to deafen our ears and blind our eyes from the truth, the Word of God.