pf2e.fyi
From Pathfinder Battlecry!, which isn't enabled.

Ethereal Crescent (Greater)

ITEM 7
Price 320 gp
Usage held in 1 hand
Bulk L

Activate (manipulate)

This crescent-shaped shard of iridescent metal is strangely translucent, fading to a blurry outline when examined for too long. A weapon under the effects of a greater ethereal crescent gains the effects of an Astral rune for 1 minute. This does not count against the weapon's normal maximum number of runes.

Effect: Ethereal Crescent

Pathfinder Battlecry!ORC