Index of Spells by Sources - Ghostwalk

Protects you from one kind of certain death.

This spell protects you against some condition--such as being immersed in boiling oil or being buried under an avalanche--that would ordinarily cause certain death. You can protect yourself only against natural occurrence or nonmagical condition, not against a spell or the direct attack of a creature (such as the breath of a dragon or the swords of a group of bandits). At the time of casting, you must specify the condition against which you wish to protect yourself. Should you be subjected to that condition during the duration of the spell, you feel no discomfort and take no damage from the condition, though the spell does not protect any items carried on your person. If you are still subject to the condition at the end of the spell's duration, you suffer its full normal effects.

Destroys 1d4 HD/level undead (max 20d4).

A circle of death snuffs out the life force of undead creatures, destroying them instantly.

The spell destroys 1d4 HD worth of undead creatures per caster level (maximum 20d4). Creatures with the fewest HD are affected first; among creatures with equal HD, those who are closest to the bursts point of origin are affected first. No creature of 9 or more HD can be affected, and Hit Dice that are not sufficient to affect a creature are wasted.