siiiiiiri

 The long sword is actually a blessed holy avenger "Justifier" 

(+4, 3d5+10) [+6, +2].
It is an artifact.

When wielded it modifies DV by +6 and PV by +2.
When used in melee combat it grants a +4 bonus to hit and causes 3d5+10 
points of damage. When used as a missile it grants a -6 bonus to hit 
and causes 3d5 points of damage.

It is a demon slayer.
It is an undead slayer.