Blackfire

In the same way that a conventional fire burns and propagates by consuming combustible fuel, blackfire burns on the fuel of a living being's life force. This spell allows the caster to fire a bolth of ravening blackfire at a single target. If the target successfully saves against Dexterity (at a -2 penalty), the bolt of blackfire misses and the spell is spent. If the bolt hits, the blackfire engulfs the target in cold flames the color of midnight.

The target must immediately make a check to determine what happens. On a roll of 11 or more on a 1d20, the target suffers no damage that round, and the blackfire burns lower; the target's hit point adjustment from Constitution applies as a bonus or penalty to the roll. If three successful checks are made in three successive rounds, the blackfire gutters out. If the check fails, the target temporarily loses 1d2 points of Constitution, losing any associated hit points and special abilities. Each round that the blackfire burns on the victim's life force, another check must be made. If the creature's Constitution score reaches 0, it dies.

If any other living being comes within 2 feet of a victim who is engulfed in blackfire, that being must make a successful Constitution saving throw, or face the same effects described above. Those killed by blackfire are irretrievably consumed; not even a Wish can restore them. Blackfire cannot be smothered by conventional means. However, blackfire will not burn in an antimagic field or on a being protected from all negative energy, and it can be blown out by the force of a fireball, lightning bolt, or similarly energetic spell (of course, the victim suffers damage from these normally) of at least 8 dice. Those who survive blackfire recover lost Constitution at the rate of one point an hour.

The material component of this spell is the ash of victims who met their end in a standard fire mixed with the dust of a vampire which was destroyed in the light of the sun.