Help Envenom

Syntax envenom <object>

The envenom skill is a cowardly skill practiced only by thieves,
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.  Food, drink, and weapons may be envenomed,
with varying effects. Poisoned food or drink puts a mild poison
spell on the consumer, and is unlikely to be more than a minor
inconvience (after all, the typical adventurer could drink sewer
water with only a trace of the runs).  A poisoned weapon, on the
other hand, 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.