Great Hornfly - How to Get & Use

Obtain Special Item for Trading (Any Will Do)

Special Items	How to Obtain
Eternal Scarlet Amber	Obtain in the Field when the Scarlet Forest Environment is 'Colossal Ambers Emergence' * Geologist Skill Does Not Boost Gathering Attempts
Fine Scarlet Amber	Obtain with a low probability from Amber Deposit
Sparkly Treasure	Obtain with a low probability from an Weathered Treasure
Bulky Treasure	Obtain in the field during 'Bountiful Treasure Emergence' in Scarlet Forest on Plenty period. * Geologist Skill Does Not Boost Gathering Attempts

Collect the mentioned items to exchange for Great Hornfly. Since Eternal Scarlet Amber can be traded for Uth Duna Plate in the same Item trade, consider other materials if necessary.

Rest at the Tent to Change Environment

When you select 'Rest' at the Tent, the current environment information changes, making it useful when aiming for an environment where trade items appear. However, each rest costs 300 guild points.

Talk to Musharpeye (First Time Only)

Once you have the required items for the exchange, meet Musharpeye at Wudwud Hideout. Speaking to them will unlock the 'Item Trade' with Musharpeye, and afterward, you can also exchange items by speaking to Nata at Base Camp.

Rest at the Tent to Refresh Trade Lineup

Great Hornfly's availability in Musharpeye's Item Trade lineup is random. Check with Nata at Base Camp to see if the exchange is available, and if not, repeat the process by resting at the tent.

Trade for the Required Amount When It Appears

Exchange for Great Hornfly when it appears in the trade lineup. However, since there is a limit to how many you can exchange at once, repeat the process by resting until you've obtained the required amount.