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From Pathfinder Impossible Magic, which isn't enabled.

Gravebane Ammunition (Greater)

ITEM 10
Price 175 gp
Bulk L

Ammunition any

Activate (manipulate)

First made to deal with a wicked necromancer's encroaching horde, gravebane ammunition is crafted with materials soaked in blessed waters. On a successful Strike, the attack deals an additional 2d10 vitality damage to creatures with void healing. If the target takes vitality damage, it must succeed at a DC 27 Fortitude save or become Enfeebled 1 (or Enfeebled 2 on a critical failure) until the start of your next turn.

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