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From Pathfinder Lost Omens Tian Xia Character Guide, which isn't enabled.

Preserved Moonflower

ITEM 7
Price 60 gp
Usage held in 1 hand
Bulk L

Activate (manipulate)
Access Tian Xia origin

Though these preserved vegetables aren't actual moonflowers, they're made using a moonflower-distilled vinegar.

When consumed, tendrils sprout from your veins and curl around you, granting you a +2 status bonus to saves against void effects for 10 minutes and reducing your wounded condition by up to 2.

Effect: Preserved Moonflower

Eating more than one preserved moonflower dish in a day doesn't grant further benefits and makes you Drained 1.

Pathfinder Lost Omens Tian Xia Character GuideORC