Sudden Strike

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[Passive]
Your attacks have a certain chance to critically hit. Critical damage also increases.

Requirements

Class	Level Required
Sheath Knight	40

Skill Level	Level Required	Self BuffSudden StrikeSelf BuffSudden Strike (On successful hit)
Skill Level	Level Required	Activation Chance	Critical Damage Increase This effect is additive to your current stats. A	Critical This effect is unnormalized. U	Duration	Reactivation Cooldown
PvE
1	40	5%	5%	100%	5 Seconds	8 Seconds
2	46	10%	10%
3	47	15%	15%
4	93	20%	20%
PvP
1	40	5%	2.5%	100%	5 Seconds	8 Seconds
2	46	10%	5%
3	47	15%	7.5%
4	93	20%	10%

All attacks excluding Hyper Actives and Master Skills can activate Sudden StrikeSudden Strike.
Sudden StrikeSudden Strike's Critical Stat is listed as Unnormalized, meaning this passive is one of the few that could completely ignore some Raid/Challenge Environmental debuffs that reduces critical rate. (which are also listed as Unnormalize Reduction on Users Stats)

Despite the passive belonging to Sheath Knight, the passive icon displays Infinity Sword's weapon.
This passive acts as a replacement for the previous passive, Fighting Spirit, which had the same effect of making all hits critical for a certain period, though it was tied to Brutal Slayer's MP burn effect at the time (which still shares the same activation rate as this passive does).

Date		Changes
KR	NA	PvE	PvP
07/23/2015	12/02/2015	Sudden Strike added.
04/21/2016	05/18/2016	▲ Activation Chance increased. ▲ Duration increased.
09/28/2017	10/18/2017	▲ Activation Chance increased. ▲ Critical Damage Increase effect added.
11/02/2017	11/15/2017	▼ Duration increased.
04/19/2018	05/16/2018	▲ Reactivation Cooldown decreased. ▲ Special actives can now activate the buff.
06/22/2023	07/19/2023	None	▼ Critical Damage Increase decreased.
05/22/2025		▲ Sudden StrikeSudden Strike Duration increased.