pf2e.fyi
From Pathfinder Adventure Path: Gatewalkers, which isn't enabled.

Polished Demon Horn (Major)

ITEM 12
UNCOMMONDIVINESPELLHEART
Price 1750 gp
Usage affixed to armor or a weapon
Bulk —

This spellheart is fashioned from the tip of a demon's horn that's been polished until smooth and shiny. The spell DC of any spell cast by Activating this item is 29.

  • Armor You gain resistance 10 to unholy.
  • Weapon After you cast an enchantment spell by Activating the horn, your Strikes with the weapon deal an additional 1d8 mental damage until end of your next turn.

Effect: Polished Demon Horn - Armor

Effect: Polished Demon Horn - Weapon

Activate Cast a Spell
Effect You cast Daze (DC 29 basic Will).
Activate Cast a Spell
Frequency once per day
Effect You cast 3rd-rank Fear (DC 29 basic Will)..
Activate Cast a Spell
Frequency once per day
Effect You cast Outcast's Curse (DC 29 Will).
Activate Cast a Spell
Frequency once per day
Effect You cast Vision of Death (DC 29 Will).
Pathfinder Adventure Path: GatewalkersORC