+2 Dagger of Venom

An attack made with this weapon deals an additional 5 points of Poison damage if a natural 20 is slid on the combat board. Creatures immune to poison will not take any extra damage from this special attack, but the dagger damage could still apply. There is no saving throw to mitigate the poison damage.

The poison effect of this weapon is triggered by sliding a natural 20. It does not require a critical hit. Thus it will function when fighting creatures immune to critical hits or sneak attacks–assuming the victim is not immune or resistant to poison.