The ancient God of Spite and Revenge grew so vile and bitter that the other gods decided to put an end to him. As final act of revenge the God of Spite cut off the finger tips of his left and fashioned them into the arrowheads for the Murderous Arrows. He then let these artifacts loose upon the world before he was struck down. At most, there are only five Murderous Arrows in existence.
Murderous Arrows grant no bonus to hit but any normal hit with an arrow is considered a critical hit (or double damage). If a natural 20 (or critical hit) is scored when attacking with a Murderous Arrow then the target is slain. It does not matter if the target is merely a lowly henchman or an ancient god from from beyond space and time. It is dead!
If a Murderous Arrow only wounds a target then the arrow then disappears only to appear in another random location in the world.
If a Murderous Arrow kills a target then the arrow ceases to exist. Additionally, the archer must make a Saving Throw versus Magic or be slain as well.
The gods fear these artifacts. Even good aligned will not hesitate to strike one of their own followers to gain possession of one of the Murderous Arrows. Any mortal possessing one of the arrows will be harassed, threatened or even killed by any number of divine servitors until the mortal no longer has the arrow.
If a magic-user attempts to use any parts of a creature that was slain with a Murderous Arrow as a material component for a spell or magic item then the magic becomes warped and twisted.