Originally Posted by Quirp
Widen Supernatural Ablity is a feat in the Tome of Magic.
I may as well let on what I am considering as if I run it it won't be for months...
Death Giant with an item of waterbreathing wandering around with some Drowned with a continuous fog bank (ie the eversmoking bottle) moving with them.
Those that get withing 30' of a drowned start making Con checks - the moment they fail one it's a fort save or be sucked into the Death Giant's aura of souls.
Speak with Dead/Ressurection won't work
And cause of death is not drowning so people not likely to realise the drowned are present until they encounter them.
(Drowned probably being the most under-CR'd creature in the game. If you know what you are facing and have the right spell you are probably OK, if not they are CR8, 20 hit dice and kill by failed CON checks within 30'.)