When a marked enemy (Orange) dies, it applies a stack of "Bolstered" to all nearby enemies within a 4-meter radius. Enemies can receive up to 5 stacks of "Bolstered." Each stack increases an enemy's size by 2% and provides a damage reduction based on their type:
- Default: 10% damage reduction per stack (up to 50%)
- Elite: 5% damage reduction per stack (up to 25%)
- Special: 6% damage reduction per stack (up to 30%)
- Captain: 2% damage reduction per stack (up to 10%)
- Monstrosity: 3% damage reduction per stack (up to 15%)
Enemies that are guaranteed to be marked (100% chance):
- Beast of Nurgle
- Plague Ogryn
- Chaos Spawn
Enemies with a 35% chance to be marked:
- Poxburster
- Scab Flamer
- Dreg Tox Flamer
- Mutant
- Scab Sniper
- Scab Trapper
- Dreg Tox Bomber
- Pox Hound
- Bulwark
- Crusher
Enemies with a 25% chance to be marked:
- Scab Bomber
- Dreg Shotgunner
- Scab Shotgunner
- Scab Gunner
- Dreg Rager
- Scab Rager
- Scab Mauler
- Reaper
Enemies with a 10% chance to be marked:
- Dreg Stalker
- Scab Stalker
- Daemonhost
- Dreg Bruiser
- Scab Bruiser
- Scab Shooter
- Dreg Gunner
Enemies with a 5% chance to be marked:
- Poxwalker
- Groaner
- Moebian 21st