EO4/Nightseeker/Skills

This page details full data for the Nightseeker's skills in Etrian Odyssey IV: Legends of the Titan.

Novice skills (Lv. 1)

Proficiency 夜賊の心得
Class Skill Greatly increases damage to enemies suffering from ailments. A skill that takes advantage of the distraction afforded by ailments.
Level	1
Damage Multiplier	×2

Ice Knife アイスブラッシュ
Sword/Knife Skill Melee ice cut attack to 1 enemy. A skill that slashes an enemy with a frozen blade. Body part used: Arms Stat(s) used: STR
Level	1	2	3	4	5	6	7	8	9	10
TP Cost	8				9					10
Damage	150%	157%	164%	170%	190%	194%	198%	202%	206%	220%
Action Speed	-3

Biding Slice ディレイスタブ
Sword/Knife Skill Melee attack to 1 enemy. If not hit this turn, do another cut attack. A skill that sets up a second attack if the enemy's attention is diverted. The Action Speed modifier only applies to the first attack. The second attack applies at end of turn with no speed modifier. If the original target dies before the end of turn, the second attack will not occur. However, if reinforcements are called in to replace the original target, the second attack may strike the replacement. If this skill is duplicated using Follow Trace, only one end-of-turn attack will still occur. Body part used: Arms Stat(s) used: STR Prerequisite skill(s): Ice Knife, lv. 3
Level	1	2	3	4	5	6	7	8	9	10
TP Cost	10				12					14
Damage (First Hit)	130%	137%	144%	150%	165%	169%	173%	177%	180%	190%
Damage (Second Hit)	130%	135%	140%	145%	160%	165%	170%	175%	180%	190%
Action Speed	-3

Sand Throw 盲目の投刃
Throw Skill Ranged cut attack to 1 enemy. May blind. A skill that throws a knife coated with certain substances. Despite the description, does not require any bladed weapons equipped. Damage uses the ATK of the primary weapon. Body part used: Arms Stat(s) used: STR, LUC
Level	1	2	3	4	5	6
TP Cost	2			3
Damage	80%
Blind Infliction Rate	45%	50%	55%	63%	67%	70%
Hit Rate Modifier	+1%		+2%		+3%
Action Speed	+2

Nerve Throw 麻痺の投刃
Throw Skill Ranged cut attack to 1 enemy. May paralyze. A skill that throws a knife coated with certain substances. Despite the description, does not require any bladed weapons equipped. Damage uses the ATK of the primary weapon. Body part used: Arms Stat(s) used: STR, LUC Prerequisite skill(s): Sand Throw, lv. 2
Level	1	2	3	4	5	6
TP Cost	3			4
Damage	80%
Paralysis Infliction Rate	45%	50%	55%	63%	67%	70%
Hit Rate Modifier	+1%		+2%		+3%
Action Speed	+2

Blade Flurry 追影の刃
Passive Skill Can attack twice per turn if two weapons are equipped. The strength of the second attack depends on the attack power of the subweapon. Enables the user to equip two weapons without needing a subclass. Weapon skills will still scale off the weapon ATK of the primary weapon. Normal attack will hit twice, once with each weapon. The second hit takes a damage penalty and uses the properties of the secondary weapon. Each hit counts as a separate action and can trigger follow-up attacks separately. If the user is panicking and attacks randomly, they will attack a random target twice. Subclassing: Stacks with Sword Dance for a total of eight attacks from one normal attack. Charge only benefits the first attack.
Level	1	2	3	4	5	6
Second Attack Damage Decrease	70%	60%	50%	40%	30%	20%

Shadow Cloak ハイドクローク
Support Skill Nulls one physical attack in the next 3 turns. A skill to evade an enemy attack by hiding behind a cloak. Buff is dispelled once a physical attack is nullified this way. Body part used: Legs
Level	1	2	3	4
TP Cost	9	8	6	4
Action Speed	+6

Auto-Cloak 先制クローク
Auto Skill Shadow Cloak may activate at the start of battle. Due to how the game ticks down buff counters, the user starts the battle with four turns of Shadow Cloak instead of three. Prerequisite skill(s): Shadow Cloak, lv. 2
Level	1	2	3	4	5	6
Activation Rate	25%	35%	43%	49%	55%	60%

Decoy Sign デコイサイン
Support Skill Increases the chances of 1 ally to be targeted by enemies for 3 turns. A feinting skill that controls who the enemy targets. By default, all party members have an aggro value of 0 to 4. Body part used: Head
Level	1	2	3	4
TP Cost	4
Aggro Value Increase	3-4	3-6	3-8	3-9
Action Speed	+6

Herbology 薬草学
Passive Skill Greater chance of finding extra plants when gathering. The effects of this skill stack if another party member also has it.
Level	1
Rare Material Rate	10%

Veteran skills (Lv. 20)

Expertise 夜賊の極意
Class Skill Further increases damage to enemies suffering from ailments. A skill that takes advantage of the distraction afforded by ailments. Overwrites the bonus from Proficiency. Prerequisite skill(s): Proficiency, lv. 1
Level	1
Damage Multiplier	×2.4

Assassinate アサシネイション
Sword/Knife Skill Melee instant kill to 1 enemy. Higher success rate against ailing enemies. A skill that performs a lethal strike. Subclassing: If this skill is affected by Wide Effect, adjacent enemies struck may also get instantly killed. Body part used: Arms Stat(s) used: STR Prerequisite skill(s): Biding Slice, lv. 2
Level	1	2	3	4	5	6	7	8
TP Cost	12			13				14
Damage	150%	155%	160%	170%	175%	180%	185%	195%
Instant Kill Rate	20%	23%	26%	28%	30%	32%	34%	35%
Instant Kill Rate (Ailing Enemy)	50%	57%	64%	70%	74%	78%	81%	85%
Action Speed	-3				-2			-1

Shadow Bite シャドウバイト
Sword/Knife Skill Melee cut attack with increased damage against ailing enemies. A skill where you perform a fatal strike from the shadows. Note that the damage multiplier on ailing enemies is subject to diminishing returns. Body part used: Arms Stat(s) used: STR Prerequisite skill(s): Assassinate, lv. 3
Level	1	2	3	4	5	6	7	8
TP Cost	15			17				20
Damage	170%	175%	180%	195%	200%	204%	208%	220%
Damage Multiplier (Ailing Enemy)	×1.90			×1.95				×2.00
Total Damage (Ailing Enemy)	323%	332%	342%	380%	390%	398%	406%	440%

Sleep Throw 睡眠の投刃
Throw Skill Ranged cut attack to 1 enemy. May induce sleep. A skill that throws a knife coated with certain substances. Despite the description, does not require any bladed weapons equipped. Damage uses the ATK of the primary weapon. Body part used: Arms Stat(s) used: STR, LUC Prerequisite skill(s): Nerve Throw, lv. 2
Level	1	2	3	4	5	6
TP Cost	3			4
Damage	80%
Sleep Infliction Rate	45%	50%	55%	63%	67%	70%
Hit Rate Modifier	+1%		+2%		+3%
Action Speed	+2

Curse Throw 呪いの投刃
Throw Skill Ranged cut attack to 1 enemy. May curse. A skill that throws a knife coated with certain substances. Despite the description, does not require any bladed weapons equipped. Damage uses the ATK of the primary weapon. Body part used: Arms Stat(s) used: STR, LUC Prerequisite skill(s): Sleep Throw, lv. 2
Level	1	2	3	4	5	6
TP Cost	3			4
Damage	80%
Curse Infliction Rate	45%	50%	55%	63%	67%	70%
Hit Rate Modifier	+1%		+2%		+3%
Action Speed	+2

Spread Throw スプレッドスロー
Support Skill The next Throw skill you use will attack all enemies. A skill that teaches the trick of throwing multiple knives at once. Treated as a buff with a one-turn duration.
Level	1	2	3	4
TP Cost	8	6	4	2

Sneak Attack 奇襲
Dungeon Skill Increases the chance of acting first in a battle. A skill that senses enemies' presence to be able to make the first move. This is an additive bonus to the preemptive and blindside formula. Due to the nature of the formula, level 4 and higher also prevents blindsides.
Level	1	2	3	4	5	6
TP Cost	6	7	8	9	10	11
Preemptive Rate Increase	25%	30%	35%	40%	45%	50%
Duration (Steps)	40	45	50	55	60	65

Speed Boost 速度ブースト
Passive Skill Increases action speed, hit rate, and evasion rate. This skill can be strengthened through training. Subclassing: Overwrites the evasion bonus of Fan Dance.
Level	1	2	3	4	5	6	7	8	9	10
Action Speed Increase	1	2	3	4	5	6	7	8	9	10
Evasion Increase	2%	5%	7%	9%	10%	11%	12%	13%	14%	15%
Hit Rate Increase	2%	5%	7%	9%	10%	11%	12%	13%	14%	15%

Agile Chef 俊敏料理
Sky Skill Increases AGI gains from cooked food. The effects of this skill stack if other party members also have it. Also reduces the AGI penalty from food.
Instances	1	2	3	4	5
AGI Increase	44%	63%	77%	89%	100%
AGI Penalty Decrease	44%	63%	77%	89%	100%

Master skills (Lv. 40)

Enlightenment 夜賊の悟り
Class Skill Further increases damage to enemies suffering from ailments. A skill that takes advantage of the distraction afforded by ailments. Overwrites the bonus from Expertise. Prerequisite skill(s): Expertise, lv. 1
Level	1
Damage Multiplier	×2.8

Swift Edge スウィフトソード
Sword/Knife Skill Multiple melee cut attacks to 1 enemy. A skill that slashes enemies with inhuman speed. Body part used: Arms Stat(s) used: STR Prerequisite skill(s): Shadow Bite, lv. 2
Level	1	2	3	4	5	6	7	8
TP Cost	21			24				28
Damage per Hit	85%	90%	95%	100%	104%	107%	109%	110%
Number of Hits	3-4			4				4-5
Damage Range	255%​-​340%	270%​-​360%	285%​-​380%	400%	416%	428%	436%	440%​-​550%
Average Damage	297%	315%	332%	400%	416%	428%	436%	495%
Hit Rate Modifier	-35%

Venom Throw 猛毒の投刃
Throw Skill Ranged cut attack to 1 enemy. May poison. A skill that throws a knife coated with certain substances. Despite the description, does not require any bladed weapons equipped. Damage uses the ATK of the primary weapon. Body part used: Arms Stat(s) used: STR, LUC Prerequisite skill(s): Curse Throw, lv. 2
Level	1	2	3	4	5	6
TP Cost	3			4
Damage	80%
Poison Infliction Rate	60%	65%	70%	74%	77%	80%
Poison Damage	200	270	350	500	600	700
Hit Rate Modifier	+1%		+2%		+3%
Action Speed	+2

Foul Mastery 闇討マスタリ
Passive Skill Increases attack power with each status ailment inflicted. A skill only those who specialize in debilitating enemies can grasp. The effect is reset when the user dies. Affects all forms of damage. If the user inflicts an ailment to multiple enemies at once, this skill increments for each enemy affected. Increment applies immediately between hits; if a Throw skill augmented by Spread Throw inflicts an ailment to the first enemy in a group, the damage bonus applies to all subsequent hits to the rest of the formation. Does not count binds, stuns or instant kills, but counts petrify. Cap of +100% ATK at all levels. Prerequisite skill(s): Swift Edge, lv. 2 Venom Throw, lv. 2
Level	1	2	3	4	5	6	7	8
ATK Increase	7%	11%	14%	17%	19%	21%	23%	25%

Follow Trace 追影の残滓
Passive Skill Weapon attack skills may sometimes activate twice. The higher the level of Blade Flurry, the more damage the second attack skill will do. The damage penalty from the user's Blade Flurry passive applies to the skill duplicate. Can still trigger even if you only have one weapon equipped. The duplicated skill will not consume TP. The duplicated skill counts as a separate action and can trigger follow-ups separately. If the initial skill defeats an enemy, the duplicate will still trigger, albeit with a random target. Not compatible with Throw skills and Burst Skills. Subclassing: Not compatible with TEC-based attacks or Shield skills (this includes Power Break and Mind Break) Charge and Charge Edge will not boost the duplicated skill. The HP/TP loss from Blood Surge will not trigger on the skill duplicate. Prerequisite skill(s): Blade Flurry, lv. 3
Level	1	2	3	4	5	6	7	8
Activation Rate	25%	30%	35%	40%	43%	46%	48%	50%

Auto-Spread 先制スプレッド
Auto Skill Spread Throw may activate at the start of battle. A skill that allows you to enter a battle prepared. Due to how the game ticks down buff counters, the user starts the battle with two turns' worth of Spread Throw instead of one. Prerequisite skill(s): Spread Throw, lv. 2
Level	1	2	3	4	5	6
Activation Rate	25%	35%	43%	49%	55%	60%

References

• Datamining for Nightseeker's skills by DrFetus/Araxxor and HououinMakise
• Skill simulator