Z,F,N,I* to build your allies and flaming necros. Don't use I if you don't want to cheeze the game. Necro doesn't work well in the Catacombs, 'CONQUERED' areas, or tiny rooms though, that's why I is best).
Once you get it, unbeatable(but Necro's cheezier if you don't play the hardest levels. People complaining they get stuck on gangs of enemies, this solves it.
