Time to finish my runes to make Ghostrider!

Frost Item 4+

Conjuration Magical
Usage etched onto a weapon

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This rune allows the user to channel the power of the elemental planes into the weapon, even if to a limited degree. Activate  1 action; Frequency once per day;  Duration 1 hour; Effect Choose an elemental damage type. For the duration, the weapon does 2 extra damage of the chosen elemental type.

Elemental Attachment Item 4

Price 70 gp
Usage etched onto a weapon

Elemental Attachment (Greater) Item 8

Price 500 gp

The weapon does 4 damage of the chosen elemental type.

Elemental Attachment (Major )Item 12

Price 2,000 gp
The weapon does 6 damage of the chosen elemental damage type