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From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Rime Crystal (Major)

ITEM 13
COLDMAGICALSPELLHEART
Price 2800 gp
Usage affixed to armor or a weapon
Bulk —

Slowly spinning at the center of this crystalline orb is a single snowflake, and its surface remains lightly covered in frost no matter how hot the weather is outside. The spell attack modifier of any spell cast by activating this item is +20, and the spell DC is 30.

  • Armor You gain resistance 10 to cold.
  • Weapon After you cast a cold spell by activating the crystal, your Strikes with the weapon deal an additional 1d8 cold damage until the end of your next turn.

Effect: Rime Crystal - Armor

Effect: Rime Crystal - Weapon

Activate Cast a Spell
Effect You cast Frostbite.
Activate Cast a Spell
Frequency once per day
Effect You cast Ice Storm.
Activate Cast a Spell
Frequency once per day
Effect You cast Howling Blizzard.
Pathfinder Treasure Vault (Remastered)ORC