Critical Hit

A Critical Hit is an attack which does 50% bonus damage. In addition, any status effects on the hit have a 100% proc rate (unless the target is immune to that effect).

All characters have a base of 1%.
 * Some classes have higher base crit rates. See Stats comparison for details.
 * Many classes offer a 2% bonus to crit rate when they are mastered.
 * Various Weapons, Armor, and Accessories will increase your crit rate.
 * The Passives Know Weakness and Know Weakness II each increase critical hit rate by 25% and stack with each other.

By default, a crit does +50% damage.
 * Wielding a Scythe increases critical damage by 25%. This bonus stacks if you are able to dual wield Scythes (requires Dual Wield and Sturdy Grip).
 * The Scoundrel passive Exploit Weakness increases critical damage by 50%.
 * If a healing ability can crit and does, its healing will be increased by your critical damage amount. Source

By default, only Regular Attacks can crit.
 * If an ability says it "counts as a regular attack" then it can crit.
 * The Fellblade's Versatile passive allows Skills, Spells, and Special abilities to crit, both for damage and healing. Source
 * will allow a skill or spell to crit, even if the character does not have Versatile.
 * Consumables can never crit, even with the above two abilities.