Unholy
Item 11EvilEvocationMagicalSource Core Rulebook pg. 585 2.0Price 1,400 gp
Usage etched onto a weapon without a
holy rune
An
unholy rune instills fiendish power into the etched weapon. A weapon with this rune deals an additional 1d6 evil damage when it hits a good target. If you are good, you are enfeebled 2 while carrying or wielding this weapon.
Activate 
command;
Frequency once per day;
Trigger You critically succeed at an attack roll against a good creature with the weapon;
Effect The target takes persistent bleed damage equal to 1d8 per weapon damage die of the etched weapon.