Deuteronomy 18:10-13 (NIV)
Let no one be found among you who sacrifices their son or daughter in the fire, who practices divination or sorcery, interprets omens, engages in witchcraft, 11 or casts spells, or who is a medium or spiritist or who consults the dead. 12 Anyone who does these things is detestable to the Lord; because of these same detestable practices the Lord your God will drive out those nations before you. 13 You must be blameless before the Lord your God.
The world has desensitised us into thinking that things such as witchcraft, mediums and the celebration of All Hallows’ Eve (Halloween) are harmless. The Bible tells us the complete opposite;
1 Thessalonians 5:21-22
but test everything; hold fast what is good. 22 Abstain from every form of evil.
.. and warns us many times, against the practice of all of these things. In fact it tells us that such things are an abomination to God and anyone who does these things will not enter the Kingdom of Heaven.
Be wise, take the Lords advice and as Romans 12:2 (ESV) says;
Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect.