Deadly Poison

(Savage Species, page 31, DnD 3.0)

[General]

Your poison attack deals more damage than normal.

Prerequisite

Virulent Poison, CON 19, poison special attack that deals ability damage as secondary damage

Benefit

Your poison attack has the potential to deal more potent secondary damage than it otherwise could. If the subject of the attack fails the second saving throw, the poison deals double its normal secondary damage.