Type: Racial
Source: Dragon #327
You do additional negative energy damage on a critical hit.
Prerequisite: Any two racial feats, Drow
Benefit: Whenever you score a successful critical hit with a melee weapon, you may choose to channel additional negative energy through your attack. Such an attack deals an additional amount of damage due to negative energy equal to your total number of racial feats. Additional damage dealt by a tainted strike heals undead creatures an amount equal to your total number of racial feats rather than damaging them.
Special: This is a supernatural effect.