To get Firefly in Lineage Piece, go to the Firefly Seller on Monument Island after collecting the required Glamoth dungeon materials, Glamoth race, 27,500,000 coins, and 30,000 gems.
Firefly is a seller unlock built around the Glamoth dungeon, not a quick one-menu purchase. Most of the grind goes into earning keys, pushing dungeon kills far enough to reach the better boss, and saving the rare drops instead of spending them early.
Firefly Seller requirements on Monument Island
| Requirement | Amount |
|---|---|
| Where to buy | Firefly Seller NPC, Monument Island |
| Molten Core | 1 |
| Shaper | 3 |
| Firefly’s Will | 6 |
| Ignition Valve | 9 |
| Armor Scrap | 250 |
| Race | Glamoth |
| Coins | 27,500,000 |
| Gems | 30,000 |
The unlock happens at the Firefly Seller NPC on Monument Island. Bring the full cost in one trip when possible, because the seller asks for dungeon materials, the Glamoth race, and both main currencies.
How to unlock Firefly in Lineage Piece
KEY!This route takes you from the key farm to the seller purchase without wasting Glamoth dungeon runs.
STEP 1/11
Farm Byte in Simulated Sea
Play Simulated Sea until you can afford keys, because each Glamoth Planet Key costs 500 Byte.
STEP 2/11
Buy Glamoth Planet Keys
Spend your Byte at the Byte shop and stock enough keys for repeated Glamoth dungeon attempts.
STEP 3/11
Enter the Glamoth dungeon
Use a Glamoth Planet Key and keep killing mobs, since bosses spawn by kill thresholds instead of normal waves.
STEP 4/11
Clear the first 50 mobs
At 50 kills, Protosam Type 3 appears and can drop Firefly unlock items.
STEP 5/11
Keep going to 100 kills
Clear another 50 mobs in the same run so Firefly Update 4 spawns after 100 total kills.
STEP 6/11
Farm Firefly Update 4 when possible
Push to Firefly Update 4 whenever your build can handle it because its drop rates are stronger across the Firefly materials.
STEP 7/11
Buy Glamoth Essence
Use the Armor Scrap shop to buy Glamoth Essence for 50 Armor Scrap each.
STEP 8/11
Roll for Glamoth race
Use Glamoth Essence until you roll Glamoth, which is required before the seller will complete the Firefly unlock.
STEP 9/11
Check the full unlock bundle
Make sure the dungeon drops, Glamoth race, coins, and gems are all ready before you leave the farm loop.
STEP 10/11
Return to the Firefly Seller
Go back to the Firefly Seller NPC on Monument Island with the completed bundle.
STEP 11/11
Buy Firefly
Spend the saved materials and currencies to finish the unlock.
Video help
Glamoth dungeon bosses to farm for Firefly materials
| Boss | Key drops | Best reason to farm |
|---|---|---|
| Protosam Type 3; 50 kills, 675 million HP | Ignition Valve, Firefly’s Will, Shaper, Firefly’s Outfit, Molten Knight title, Molten Core | Early boss access; use it when a run cannot reach the 100-kill boss. Molten Core is 0.87% here. |
| Firefly Update 4; 100 total kills, 1.25 billion HP | Ignition Valve 14.5%, Shaper 10.15%, Firefly’s Will 10.15%, Molten Knight title 8.7%, Firefly’s Outfit 7.25%, Molten Core 2.32% | Best Firefly material farm, with the stronger Molten Core chance and better rates across the main drops. |
Glamoth dungeon runs are boss-threshold runs. Protosam Type 3 is the first boss after the early mob clear, while Firefly Update 4 is the higher-efficiency target if you can push the run further.
Dungeon drop rates can move in a live update, but the farm priority is clear: Firefly Update 4 has the better material spread, especially for Molten Core.
Spend keys on runs you can push to 100 kills; stopping at the first boss is slower for rare Firefly materials.
Getting Glamoth race for the Firefly purchase
The race check is handled separately from the dungeon drops. Buy Glamoth Essence from the Armor Scrap shop for 50 Armor Scrap each, then use the essence rolls until the result lands on Glamoth.
Fast Firefly grind checklist
- Farm Byte in Simulated Sea.
- Buy Glamoth Planet Keys from the Byte shop.
- Push Glamoth dungeon runs to 100 kills whenever possible.
- Save every Firefly material: Molten Core, Shaper, Firefly’s Will, Ignition Valve, and Armor Scrap.
- Turn Armor Scrap into Glamoth Essence, then roll until you get Glamoth.
- Return to the Firefly Seller with the coins and gems to buy Firefly.
Frequently Asked Questions
Where is the Firefly Seller NPC in Lineage Piece?
The Firefly Seller NPC is on Monument Island. Treat that visit as the final hand-in after the dungeon grind and race roll are done.
How do you get Glamoth Planet Keys?
Buy Glamoth Planet Keys from the Byte shop for 500 Byte each. If you are out of Byte, go back to Simulated Sea first.
Should you stop at Protosam Type 3 or push to Firefly Update 4?
Push to Firefly Update 4 if your run can handle the extra kills. Stop at Protosam Type 3 only when continuing would likely waste the run.
How do you get the Glamoth race?
Use Glamoth Essence from the Armor Scrap shop. Each essence costs 50 Armor Scrap, so save more scrap than the seller’s listed cost if you still need to roll the race.
What is the hardest Firefly material to farm?
Molten Core is the harshest listed material. It has the lowest listed chance on both Glamoth dungeon bosses, which is why the 100-kill boss matters so much.
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