Firefly is a Legends of Idleon monster: 7 drops, gives 1 resource.

Firefly | Idleon Toolbox

Firefly

As you gaze upon the firefly's majesty, you simply CANNOT BELIEVE YOUR EYEEES.

Firefly_Card

Increases Fishing Efficiency by 40%. Golden foods are never consumed.

Golden_Ribs

Hold down to add this accessory to it to your fishing toolkit, where it can be accessed by all characters!

Its_a_Girl_Celebration

Hold down on this item to turn 10 Fragments into 1 Talent Point Reset Potion. You'll need 1 open inventory space for this to work.

Talent_Point_Reset_Fragment

Hold down to add a Silver Pen to your Post-Office! You can use it to skip a Delivery!

Silver_Pen

Drag onto any Equip to apply. Success Chance; 60% Uses up 1 slots only if Successful. WARNING:Mystery Stat has a chance to be Negative, and reduce stats!

	Name	Qty	Rate	Chance
Base drops
	Firefly Card		1 in 1,000,000	0.000100%
Rare Drop table rolls 1 in 67DropTable23
	Its a Girl Celebration		1 in 83,300	0.00120%
Mega-Rare table rolls 1 in 11,100SuperDropTable4
	Mystery Upgrade Stone II	3	1 in 15,900	0.00630%
	Golden Ribs		1 in 22,200	0.00450%
	Talent Point Reset Fragment		1 in 74,100	0.00135%
	Silver Pen		1 in 123,000	0.000810%
	Lucky Lad		1 in 37,000,000	0.00000270%

Wiki

Firefly

Drops

Gives