Critical hit

Whenever you hit an opponent, you have a chance of landing a critical hit.
 * If your unmodified attack roll (1d20) is in the attack's threat range AND you would have scored a hit then the attack is a critical threat.


 * Threat range depends on the weapon - in the example here, the threat range is 17-20. A 17, 18, 19 or 20 on the first roll and scoring a hit would constitute a critical threat. Threat range can be increased by spell effects or feats.
 * A critical threat allows you to make another roll (confirming roll). If this second roll would also have scored a hit, you have accomplished a critical hit.


 * Scoring a critical hit multiplies most of the normal damage dealt - damage from sneak attacks, energy damage and elemental damage are not included.
 * The sword in the example here has a multiplier of 2 - note the Critical 17-20/x2
 * Damage here would be 2 x (1d10 + 7 + 3) (physical damage is multiplied) + 1d6 acid + 1d6 sonic (elemental damage is not multiplied)
 * Damage on a normal hit would range from 13-32 on a critical from 24-52


 * Some creatures are immune to critical hits