If you must have Halloween, God has offered you a simple alternative. Become a great celebrator of Halloween and reject Christianity, because He cannot stand you polluting His name with your hypocrisy (Ezek 20:39; Hos 4:17; Amos 4:4-5).
When a devil or sorcerer meets God, he knows he is helpless; and one day God will cast all devils, sorcerers, and witches into the Lake of Fire (Ex 7:11-12; 8:18-19; 9:11-12; Mark 1:24; 5:7; Rev 21:8; 22:15).
Christians do not threaten “trick or treat” to anyone for any reason, so parents should not endorse such profanity (Gal 5:14; Eph 4:31-32; I Thes 5:15; Jas 2:8), and neither do Christians deceive others with masks, even for a joke (Pr 26:18-19; Rom 13:13).
Halloween is an evil day originating with unbelievers and infidels, based on blackness, darkness, night, unrighteousness, and infidelity, which Christians should separate from and not even touch, if they want to be God’s children (II Cor 6:14-18).
All quotes are from the link.