The Collaborative International Dictionary of English v.0.48:
Necromantic \Nec`ro*man"tic\, Necromantical \Nec`ro*man"tic*al\, a. Of or pertaining to necromancy; performed by necromancy. -- Nec`ro*man"tic*al*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
necromantical adj 1: relating to or associated with necromancy; "mysterious necromantic rites" [syn: necromantic, necromantical]