Celestial Peachwood SwordWeapon 17
Source Pathfinder Book of the Dead
Damage 1d6 Piercing
Type Martial
Price 15,000 gp
Weight light
From blade to pommel, this sword is carved from a branch of the now-extinct celestial peach tree. The blade of this+3 greater striking Disrupting Holy shortsword has ancient runes that can permanently destroy the most powerful undead - if you are willing to pay the price.
An undead creature of 12th level or lower that takes damage from a Strike with the sword takes 10d6 Positive Damage (DC 35 basic fortitude). This damage is separate from the Strike itself and isn't included in any effect based on the Strike's damage.
Activate 
envision
Frequency once per day
Trigger You critically hit an undead creature with the celestial peachwood sword
Effect The creature must succeed at a DC 35 fortitude or be destroyed. If the undead fails its saving throw and is destroyed, you suffer a backlash, taking 1d6 negative damage per level of the destroyed undead.
Traits
This rarity indicates that a rules element is very difficult to find in the game world. A rare feat, spell, item or the like is available to players only if the GM decides to include it in the game, typically through discovery during play. Creatures with this trait are rare. They typically can't be summoned. The DC of Recall Knowledge checks related to these creatures is increased by 5.
GoodGood effects often manipulate energy from good-aligned Outer Planes and are antithetical to evil divine servants or divine servants of evil deities. A creature with this trait is good in alignment. An ability with this trait can be selected or used only by good creatures.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
NecromancyEffects and magic items with this trait are associated with the necromancy school of magic, typically involving forces of life and death.
PositiveEffects with this trait heal living creatures with positive energy, deal positive energy damage to undead, or manipulate positive energy.
VersatileA versatile weapon can be used to deal a different type of damage than that listed in the Damage entry. This trait indicates the alternate damage type. For instance, a piercing weapon that is versatile S can be used to deal piercing or slashing damage. You choose the damage type each time you make an attack.