I'm creating a pair of ghost assassins for use in a Nemesis-type role in my campaign setting, and I'd like them to be as scary as possible within a few limits. Difficulty: 12 levels in character classes; human base; and the actual Assassin prestige class would not have been available to the characters in life. Neither can they be warlocks, warmages, duskblades, any of the ToB classes, or psionic classes for setting-related reasons. They are also unlikely to be divine casters but I'll consider it. They do not have to be evilly aligned.
The setting is lowish-magic, but the era the ghosts hail from is not, so DMG-standard equipment is ok, and whatever's good from splatbooks. They are supposed to be figures of legend and terror so it is fine if they are powerful for their CR. I would like them to be very able to carve up 12th and 13th level characters. Not infallibly able, necessarily, there are other powers behind them that can back them up, but they ought to be very capable.
So far I've got a wizard ghost, but I'm stuck. Two wizard ghosts? Eh, maybe.
The setting is lowish-magic, but the era the ghosts hail from is not, so DMG-standard equipment is ok, and whatever's good from splatbooks. They are supposed to be figures of legend and terror so it is fine if they are powerful for their CR. I would like them to be very able to carve up 12th and 13th level characters. Not infallibly able, necessarily, there are other powers behind them that can back them up, but they ought to be very capable.
So far I've got a wizard ghost, but I'm stuck. Two wizard ghosts? Eh, maybe.