The Chthonic do not attack those who had a recent smoke cleansing.

Normal: The underworld opens its gates and their dead come and wreak havoc. All creatures within the area count as being flanked, the area is treated as difficult terrain. Creatures within the area, must succeed a will save or become frightened.

Reverse: The underworld returns its call. All undead creatures within the area must succeed a will save or take 1d8 points of damage per caster level. The damage is halved on a successful save.

If a creature recently died or an undead creature is struck down to 0 hit points within the area, it must succeed a will save or can only be brought back using a true resurrection.

If there is no dead creature nearby except a worthy sacrifice, you can ask one question towards a deceased one.