Yes. Voodoo also known as black magic is does exist. It has its history from the slaves whose intention was to keep and teach on their beliefs. The belief is that everyone has a spirit and when death comes the spirit goes unknown.
We know a missionary who served in Hatti and said voodoo is very much practiced. If you are filled with the Holy Spirit, their practices will not have any effect. This is an evil spiritual practice, calling up evil demons who delight in evil works. It's similar with ghosts. A Holy Spirit dwelled person will not see or hear them.