Bloomreaper the Invincible is Borderlands 4’s first raid boss, added December 11, 2025 in a free content update alongside Ultimate Vault Hunter Mode Rank 6. It’s the gear check before Raid Boss 2 (Subjugator and Thol) raises the bar to UVH 7 on May 28. We are an unofficial fan site; this guide is sourced from official notes and community boss guides (MentalMars) and checked for v1.6.
Region: The Bloom, Carcadia Burn
Requirement: Level 50+ endgame build, UVH Rank 6+
Farmable: Yes, repeat the encounter for the loot pool
How to unlock Bloomreaper
After finishing the main campaign, pick up the side mission “The Wrath of Bloomreaper” from a Bounty Board in a Faction HUB town. To reach the arena, fast-travel to the Lowrise Safehouse in the Tonnage Peel province of Carcadia Burn and head south toward the Bloom. Bring an optimized skill tree and your strongest weapons — this is tuned for endgame builds.
The three phases
- Crystals. Destroy the Vile Crystals surrounding Bloomreaper and clear the Vile Wisps it spawns.
- Thorns and lasers. Move across the platforms while dodging laser attacks and thorns.
- Fog. A final immunity phase in heavy fog — survive it to open the kill window.
Loot pool
Bloomreaper drops a pool of 9 legendaries. Weapon drops are 15% (+2% per UVH Rank), with one guarantee:
- Rainmaker — Ripper sniper, guaranteed at Platinum tier on first clear
- Mantra — Maliwan shotgun
- Jetsetter — Ripper heavy weapon (ordnance)
- Urchin — Tediore grenade mod
- Undershield — Vladof shield
- Class mods — Lamplighter (Amon), Trooper (Harlowe), Overdriver (Rafa), Misericorde (Vex)
Element and card stats scale with your level and roll, so verify them on your own drop.