Mancer is a common Greek suffix, which denotes someone who can divine or practice magic. Necromancer indicates someone who divines using the dead. Eliphas Levi often uses Nigromancer to be someone who does Black magic. Cartomancer is someone who divines using cards. Geomancy is a magic done using the earth and proximity to natural phenomena or landmarks. Geomancers could also use handfuls of earth for magical ends. Feng Shui (which means Wind-Water) is a Chinese form of Geomancy. Cheiromancy is divination, performed by observing lines such as on the palm of the hand. Oneiromancy divination through using dreams. Pyromancer means fire magician. You can really add anything like for example Technomancer, which is a person who practices a form of magic that is aided by technology or performed using technology.
See also other types of Magical Practitioner.