Necromancer wizards have lost most of their spells. Finger of death, wail of the banshee and soulbind have been shunted to divine and occult lists, and for some reason implosion is on the arcane list.
The logic here is bizarre; necromancer wizards have almost no higher level spells except horrid wilting, and their spells have been given to divine casters. Finger of death and wail of the banshee have always been arcane spells, with wail shared with Death domain clerics.