Envenom

From IvaPedia

Syntax: envenom <poison type>

The Envenom skill is a cowardly skill practiced only by rogues, designed to win a battle through alchemy and treachery rather than skill or strength. Or, put another way, it's a skill used by the smart to kill the foolish. You need an empty glass vial to store the created poison and you'll need to apply it on your weapon to envenom it. A poisoned weapon can inflict serious damage on an opponent as the poison burns through his bloodstream. But be careful, blade venom evaporates quickly and is rendered almost powerless by repeated blows in combat.