Critical Weakness

Critical Weakness causes hits against affected targets to have +0.5% to Critical HitCritical HitsCritical Hits deal +100% extra damage (i.e. twice as much damage) by default. Critical Damage Bonuses can further modify this value. Attacks usually use your weapon's base Critical Hit Chance, while Spells and some other skills have their base Critical Hit Chance listed on the skill. Most modifiers to Critical Hit Chance are percentage based. For example, gaining 100% increased Critical Hit Chance on a base Critical Hit Chance of 7% would result in a final Critical Hit Chance of 14%. Chance, and can stack up to 20 times. If not otherwise specified, each stack lasts for 4 seconds.