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PFS StandardDefiled CostaItem 14+

Rare Catalyst Consumable Magical 
Source Impossible Lands pg. 177
Usage held in 1 hand; Bulk L
Activate [one-action] envision
This still-bloody rib was taken from a priest of Urgathoa at the moment they passed into undeath and has a constant stench of decay. The first time any creature critically fails its saving throw against a mask of terror spell cast using this catalyst, it also takes 6d10 mental damage, with a basic Fortitude save against the spell's DC, as it lives through the memory of having its rib torn from its body. Once any creature takes this damage, the defiled costa's effect ends, and no other creatures take the damage, even if they critically fail.

PFS RestrictedDefiled CostaItem 14

Source Impossible Lands pg. 177
Price 900 gp
Bulk L

PFS RestrictedDefiled Costa (Greater)Item 17

Source Impossible Lands pg. 177
Price 2,500 gp
Bulk L
A creature who critically fails against this save is killed instantly. This effect has the incapacitation trait.