In Darkest Dungeon II, most hero or enemy skills have a chance to become a critical hit, or crit, dealing more damage or healing more than normal.
Critical Hits[]
When attacking an opponent, a critical hit deals damage equal to 150% of the maximum (non-critical) damage of the skill. Skills that do damage over time have their durations extended by 2 turns. Furthermore, critical hits have 20% higher resistance piercing for any effects they may apply, including damage over time, debuffs, and movement.
When a hero receives a critical hit, they also gain 1 
stress; each party member also has a 15% to gain 1 . Likewise, a hero who lands a critical hit on an enemy has a 50% chance of reducing their stress by 1, and each party member has a 5% chance to do the same.
Critical Heals[]
Almost all healing skills and items have a 5% chance to critically heal, restoring 150% the normal amount of 
HP. There are two notable exceptions:
- The Flagellant's
and tokens can never critically heal. - The Occultist's Wyrd Reconstruction has a number of unique interactions with critical healing.
