Firefly

General

Type

Item

Acquisition

Comes out of

Opened from	Amount	Chance
Bait Pack (Tier 2)	3–6	33%

Bonus loot rolls

Where	Needs	Chance per roll	Most per save
Catacombs Shrine (after fights in the Catacombs)	Difficulty 1+	7.1% at 1 → 2.3% at 5	No limit

A shrine’s pool grows with its difficulty, so one entry’s chance falls as you raise it.

Found in the world

Location	Found at	Conditions
Catacombs 2F	Item	No conditions

Rolled

Comes out of a Bug Spawner, which picks one of 30 things each time — Catacombs 1F, Catacombs 2F, Catacombs 3F, Sealed Chamber (2F) and 18 other places.

Is used at 39 spots in Lakefront, and one is used up each time.
Is used on each Fishing Spot in Campsite (59 in all), and one is used up each time.
Is used at 17 spots in Radio Station, and one is used up each time.

2 recipes use Firefly, at 2 stations.

Makes	Ingredients	Learned
Ring of Nature +4	Crafting Pattern (1) Light Crystal (1) Spiritwood (10) Golden Mushroom (1) Firefly (3)	Known from the start · crafted once

Makes	Ingredients	Learned
Night-Owl Potion	Vileroot (5) Basic Herb Bundle (1) Firefly (2) Tooth Dust (1)	Learned by using Tome of Lost Tinctures

For Art Gallery paintings

It is used in 2 recipes; check those uses before selling surplus copies.
It is a useful gift for Celeste, Sam, and Tanner, who like it.
Set aside 5 copies for the listed Art Gallery painting requirement before selling or processing the rest.
Its stated function is: Fishing Bait. Plan its use around that effect rather than treating it as a generic sale item.