Vorpal

A vorpal weapon can instantly kill most kinds of creatures. On an attack roll of a natural 20 which is also confirmed as a critical hit, the enemy's "head is cut off". There is no special animation for this (aside from a blueish coloration)- the monster simply dies.

The following creatures are immune to vorpal (generally because they do not have a head, do not need a head to survive, or are immune to instant-death effects) Undeads (except vampires) Constructs (except warforged) Red-named bosses Beholders Oozes Also, the Deathblock and Deathward effects prevent vorpal. Fortification does not.

The vorpal property can only occur on slashing weapons, and is worth +5.