Bramblesong is a flying boss in the Bittervein abandoned Auger mine in northern Stoneblood Forest, Terminus Range. Reach the mine after progressing the campaign into Terminus Range and completing Shadow of the Mountain. Reported legendary drops include the Convergence shotgun, Boomslang sniper rifle, and Destructo Disco grenade, but no verified item-specific drop rates or guaranteed drops are established.
Where to find Bramblesong
Bramblesong is in Bittervein, an abandoned Auger mine at the northernmost point of Stoneblood Forest in Terminus Range. PC Gamer’s location guide places the mine behind Substation Canonary and recommends heading northwest from the Deathright silo.
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Unlock and reach the arena
- Progress the campaign into Terminus Range.
- Complete Shadow of the Mountain to access abandoned Auger mine activities. Before that, an energy barrier blocks entry to the mine.
- Travel to Bittervein, fight through the mine, and drop into Bramblesong’s arena.
Bramblesong’s reported legendary drops
Game8’s drop listing reports three legendary rewards. PC Gamer independently identifies Convergence as a dedicated Bramblesong drop and says it can also come from the broader world loot pool.
| Item | Type | What is established |
|---|---|---|
| Convergence | Legendary Shotgun | PC Gamer describes it as a dedicated Bramblesong drop that is also in the world loot pool. Its guide describes an Asymptotic trait and variation in elements and parts. |
| Boomslang | Legendary Sniper Rifle | Reported by Game8; no independent confirmation or item-specific drop rate is established here. |
| Destructo Disco | Legendary Grenade | Reported by Game8; no independent confirmation or item-specific drop rate is established here. |
The three-item list is a secondary-source report, not an officially confirmed drop table. None of the reviewed sources establishes a percentage chance for any named item or says that a normal Bramblesong kill guarantees one. Expect farming to involve repeated attempts rather than a guaranteed named reward. PC Gamer reports that its writer’s first Convergence came from a random drill site, consistent with the weapon also being in the world pool.
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How to handle the Bramblesong fight
Bramblesong flies and creates damaging sludge pools on the floor. PC Gamer cautions that players who focus on the airborne boss may fail to notice the pools. Keep checking the ground while tracking Bramblesong so you can move out of hazardous areas.
The available guidance does not establish a full attack-phase breakdown, a best build, or a reliable time-to-kill. Treat the advice here as a hazard to watch for, not a complete encounter strategy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to know about loot and weekly rotations
Loot that gets stuck
Official Borderlands 4 update notes, updated July 2026, say: “Updated areas where loot could get stuck, including Bramblesong and the final ramp in How Rush Saved Mercenary Day”. The notes confirm that those areas were updated; they do not establish that every out-of-reach or lost-loot case is fixed.
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Big Encore Boss status changes weekly
Bramblesong was listed as the Big Encore Boss in the official April 23, 2026 weekly update. That dated listing does not show whether Bramblesong is active on October 8, 2026; check the current official weekly post for the live rotation.
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