Heavy Attack is a character deck card in Back 4 Blood that is Defense Type with Brawn 
Affinity.
Card Ability
Charge: Hold R2 with Melee weapons to burst forward.
Charge attacks deal 100% increased damage.
The Heavy Attack card in Back 4 Blood is a fast way to increase melee damage by 100%. However, its long activation time make it more useful as a way to trigger the Hellfire movement speed bonus.
Pros
- Increases melee damage by 100%
- Fire Axe and Hatchet swing becomes a horizontal swing hitting in a wide frontal arc
- Triggers Hellfire movement speed bonus while holding R2
Cons
- Must hold R2 until stamina drains to activate Heavy Attack
- Holding R2 for Heavy Attack will continuously drain stamina until stamina is depleted or R2 released
- Stamina drain while holding R2 drains much faster with the Fire Axe
Card Synergies
Hellfire – As previously mentioned, Heavy Attack in Back 4 Blood will make the player run 45% faster when holding R2. This is best used while using the Machete or Hatchet because they drain stamina the slowest.