Callous
boss
Updated: Feb 26, 2026

Borderlands 4Callous

Borderlands 4
  • Source Type
    Boss
  • Location
    Heart of the Mountain
  • Quest Type
  • Quest Giver
Note:

Callous Harbinger of Annihilating Death

Craven's Nook - Order Bunker

Description:

CallousLocation & Map

Heart of the Mountain

Heart of the Mountain

Heart of the Mountain

CallousLoot Pool

Callous - Quest Rewards

Shotgun
Hot Slugger

Hot Slugger

  • Callous
    9%
Bonus Chance: +2% × UVH
Phosphene: 0.3% + 0.1% × UVH
Big Encore: 30%, Phosphene: 1.5%
Shotgun
Kaleidosplode

Kaleidosplode

  • Callous
    9%
Bonus Chance: +2% × UVH
Phosphene: 0.3% + 0.1% × UVH
Big Encore: 30%, Phosphene: 1.5%
Heavy
Atling Gun

Atling Gun

  • Callous
    9%
Bonus Chance: +2% × UVH
Big Encore: 30%

Sources in Heart of the Mountain

Callous
boss

Callous

Boss

Callous related Sources

Callous doesn't have any related Sources entered!