A relatively new syncretic religion in Mexico has been growing as an off-shoot of the cult of La Santa Muerte. In their practice, those devotees of the angel (i.e. the Devil) can approach his worship in a less aggressive way, and more openly. In Pachuca at the cathedral of La Santa Muerte, worshippers of El Angelito Negro can offer devotions, make deals and ask help of the Devil. Some may ask for healing, others for blessing, and others for cursing. His favors may come with the cost of their own blood.
The Book of Faustus 