Skill.dat

Numerical parameters for buff and utility skills (duration, strength, per-class scaling)

Tuning constants for passive and buff skills cast from Skill.txt entries: how strong the effect is, how long it lasts, and per-class multipliers that scale strength on player targets. Skill handlers read these values at cast time and pass them to the effect manager.

This file does NOT define the per-skill cost, range, target type, AOE shape, or master-tree wiring of each skill. Those columns live in Skill.txt (cost, distance, target filter, base damage range) and MasterSkillTree.txt (master-skill add-on bonuses that the formulas below sum into the same value).

File Location

GameServer/Data/GameServerInfo - Skill.dat

All keys live under [GameServerInfo]. Changes require a GameServer restart.

Key Patterns

Most skill blocks follow one of a few shapes. Once you know the pattern, reading any block is easy.

Suffix	Meaning
<Skill>ConstA/B/C/D	Effect-strength formula terms. Common shapes are ConstA + stat/ConstB + stat2/ConstC (additive base plus stat-divided ramps), stat/ConstA (pure divisor), and a paired apply-rate plus effect-strength form (ConstA + Energy/ConstB for chance, ConstC + Energy/ConstD for strength). B, C, D are divisors, not multipliers. Smaller divisors mean more contribution per stat point.
<Skill>Rate<CLASS>	Per-class multiplier applied to the effect strength, expressed as percent. 100 = no change. Applied as value * Rate / 100 only when the target is a player. Class codes: DW, DK, FE, MG, DL, SU, RF. The RF slot is read only for season 5+ builds; the others are always read.
<Skill>TimeConstA/B	Duration in seconds. Usually TimeConstA + Energy/TimeConstB (A = base seconds, B = divisor for the stat-driven bonus). Some skills use TimeConstA alone for a fixed duration.
<Skill>MaxRate	Hard cap on the effect strength. Applied after the ConstA/B/C/D math and after master-skill bonuses, before the per-class rate scales the result.
<Skill>MaxTime	Hard cap on effect duration in seconds.

When in doubt, raise ConstA to make an effect stronger. Raise TimeConstA to make it last longer. Leave Rate<CLASS> at 100 unless balancing one class. A divisor key set to 0 will integer divide-by-zero and crash the calling thread - always keep divisors above 0.

Master-tree add-ons from MasterSkillTree.txt sum into the same value after the base formula and before the MaxRate cap. The master tree can also extend the duration of several buffs (Greater Defense, Greater Damage, Mana Shield) by adding seconds to the count.

Mana Shield

Key	Default
ManaShieldConstA	10
ManaShieldConstB	50
ManaShieldConstC	200
ManaShieldRate<CLASS>	100 each
ManaShieldTimeConstA	60
ManaShieldTimeConstB	40
ManaShieldMaxRate	50

Absorption percent = ConstA + Dex/ConstB + Energy/ConstC, plus the master-tree Mana Shield Improved bonus, capped at MaxRate, then scaled by the per-class Rate for the target. Duration seconds = TimeConstA + Energy/TimeConstB, with the master-tree Mana Shield Enhanced bonus added to the count. Default MaxRate = 50 caps absorption at 50% of incoming damage.

Defense (passive shield block)

Key	Default
DefenseConstA	50
DefenseTimeConstA	4

This is the shield-equipped passive damage reduction, not a cast buff. DefenseConstA is the percent of damage absorbed by the shield while the reduction window is active. DefenseTimeConstA is the window length in seconds: after a successful block the reduction stays armed for that many seconds before the player must trigger it again. The shield slot must hold a real shield with at least one option for the reduction to apply.

Heal

Key	Default
HealConstA	5
HealConstB	5

HP restored = ConstA + Energy/ConstB, then scaled up by the master-tree Heal Improved percent. Target may be self, a party member, or an owned summon. Result is clamped to the target's max HP.

Greater Defense

Key	Default
GreaterDefenseConstA	2
GreaterDefenseConstB	8
GreaterDefenseRate<CLASS>	100 each
GreaterDefenseTimeConstA	60

Defense bonus = ConstA + Energy/ConstB, then increased by the master-tree Greater Defense Improved and Enhanced percents, then scaled by the per-class Rate. The number stored on the buff is value * 2. Duration seconds = TimeConstA, with extra seconds added per master-tree Greater Defense Enhanced level.

Greater Damage

Key	Default
GreaterDamageConstA	3
GreaterDamageConstB	7
GreaterDamageRate<CLASS>	100 each
GreaterDamageTimeConstA	60

Damage bonus = ConstA + Energy/ConstB, increased by master-tree Greater Damage Improved and Enhanced percents, then scaled by the per-class Rate. Duration seconds = TimeConstA, plus seconds per master-tree Greater Damage Enhanced level.

Summon Monster

Maps the 8 summon slots to monster indices. Change these to summon different monsters from each slot.

Key	Default	Slot
SummonMonster1	26	1
SummonMonster2	32	2
SummonMonster3	21	3
SummonMonster4	20	4
SummonMonster5	10	5
SummonMonster6	150	6
SummonMonster7	151	7
SummonMonster8	353	8

SummonMonster8 is read only on season 7+ builds (not the current EX603 build). Monster indices must exist in Data/Monster/Monster.xml.

Greater Life (Swell Life)

Key	Default
GreaterLifeConstA	12
GreaterLifeConstB	100
GreaterLifeConstC	20
GreaterLifeRate<CLASS>	100 each
GreaterLifeTimeConstA	60
GreaterLifeTimeConstB	10
GreaterLifeMaxRate	100

Max-HP bonus percent = ConstA + Vitality/ConstB + Energy/ConstC, plus the master-tree Greater Life Improved bonus, capped at MaxRate, then scaled by each target's per-class Rate. Casting in a party applies to every party member in radius. Duration seconds = TimeConstA + Energy/TimeConstB.

Fire Slash

Key	Default
FireSlashConstA	10
FireSlashConstB	50
FireSlashTimeConstA	10
FireSlashMaxRate	30

Damage-over-time strength = ConstA + Strength/ConstB, plus the master-tree Fire Slash Enhanced bonus, capped at MaxRate. The DoT runs for TimeConstA seconds. The stat is Strength, not Energy.

Greater Critical Damage

Key	Default
GreaterCriticalDamageConstA	25
GreaterCriticalDamageConstB	30
GreaterCriticalDamageTimeConstA	60
GreaterCriticalDamageTimeConstB	10

Critical-damage rate gained = Energy/ConstA + Leadership/ConstB. ConstA and ConstB are pure divisors here, not a base + ramp pair. Duration seconds = TimeConstA + Energy/TimeConstB.

Stern (chain stun)

Key	Default
SternTimeConstA	10

Stun duration in seconds applied to each target hit by the chain stun follow-up of certain skills. There is no chance roll here; the chance is decided by the calling skill or master tree.

Greater Mana

Key	Default
GreaterManaConstA	50
GreaterManaTimeConstA	60

GreaterManaConstA is stored directly as the buff strength (it is not divided by any stat). TimeConstA is the duration in seconds. The downstream effect handler decides what the strength means (commonly bonus max mana percent or mana regen rate).

Invisibility

Key	Default
InvisibilityTimeConstA	60

Duration seconds. No strength term.

Brand

Key	Default
BrandTimeConstA	10

Duration seconds for the guild brand state. No strength term.

Infinity Arrow

Key	Default
InfinityArrowTimeConstA	1800

Duration seconds. No strength term.

Magic Damage Immunity

Key	Default
MagicDamageImmunityTimeConstA	10

Duration seconds. No strength term.

Physi Damage Immunity

Key	Default
PhysiDamageImmunityTimeConstA	10

Duration seconds. No strength term.

Drain Life

Key	Default
DrainLifeConstA	10
DrainLifeConstB	23

HP drained on hit = damage * ConstA / 100 + Energy / ConstB. ConstA is a percent of the outgoing damage, ConstB is a stat divisor that adds a flat bonus on top.

Reflect Damage

Stacks with the Character.dat reflect rates.

Key	Default
ReflectDamageConstA	30
ReflectDamageConstB	42
ReflectDamageRate<CLASS>	100 each
ReflectDamageTimeConstA	30
ReflectDamageTimeConstB	25
ReflectDamageMaxRate	50

Reflect percent = ConstA + Energy/ConstB, capped at MaxRate, then scaled by the per-class Rate for the target. Duration seconds = TimeConstA + Energy/TimeConstB.

Sword Power

Key	Default
SwordPowerConstA	30
SwordPowerConstB	60
SwordPowerTimeConstA	30
SwordPowerTimeConstB	20
SwordPowerMaxRate	100

Damage bonus rate = Energy/ConstA, capped at MaxRate, applied to both the physical and magical damage adders. Defense bonus rate = max(10, 40 - Energy/ConstB), applied to the shield defense reduction. Duration seconds = TimeConstA + Energy/TimeConstB.

Sleep

Key	Default
SleepConstA	15
SleepConstB	37
SleepTimeConstA	1
SleepTimeConstB	250
SleepMaxTime	5

Apply chance percent = ConstA + Energy/ConstB. Duration seconds = TimeConstA + Energy/TimeConstB, hard-capped at MaxTime. Default SleepMaxTime = 5 caps sleep duration at 5 seconds regardless of formula output.

Lesser Defense (debuff)

Key	Default
LesserDefenseConstA	32
LesserDefenseConstB	50
LesserDefenseConstC	12
LesserDefenseConstD	110
LesserDefenseTimeConstA	5
LesserDefenseTimeConstB	300
LesserDefenseMaxRate	40

Apply chance percent = ConstA + Energy/ConstB. Defense penalty applied to the target = ConstC + Energy/ConstD, capped at MaxRate. Duration seconds = TimeConstA + Energy/TimeConstB.

Lesser Damage (debuff)

Key	Default
LesserDamageConstA	32
LesserDamageConstB	50
LesserDamageConstC	3
LesserDamageConstD	93
LesserDamageTimeConstA	5
LesserDamageTimeConstB	300
LesserDamageMaxRate	40

Apply chance percent = ConstA + Energy/ConstB. Damage penalty applied to the target = ConstC + Energy/ConstD, capped at MaxRate. Duration seconds = TimeConstA + Energy/TimeConstB.

Sahamutt

Key	Default
SahamuttConstA	60

Final damage = raw_damage * ConstA / 100, then increased by the master-tree Sahamutt Enhanced percent. Shipped default scales Sahamutt to 60% of the base hit damage.

Neil

Key	Default
NeilConstA	60

Final damage = raw_damage * ConstA / 100. Shipped default scales Neil to 60% of the base hit damage. The master-tree Neil Enhanced bonus controls the chance of the stun side effect, not the damage scale.

Magic Circle (Expansion of Wizardry)

Key	Default
MagicCircleConstA	20
MagicCircleTimeConstA	1800

Damage bonus value = (Energy / DWMagicDamageMinConstA) * MagicCircleConstA / 100. The Dark Wizard magic damage divisor lives in Character.dat. Duration seconds = TimeConstA. Self-only buff.

Shield Recover

Key	Default
ShieldRecoverConstA	2
ShieldRecoverConstB	6

SD restored = (SkillLevel + 1) * ConstA + Energy / ConstB. Result is clamped to the target's max SD. Increases monster aggro by value / 40 against viewport mobs.

Dragon Slayer

Key	Default
DragonSlayerConstA	10
DragonSlayerConstB	100
DragonSlayerConstC	10
DragonSlayerConstD	30
DragonSlayerMaxRate	50

Apply chance percent = ConstA + Energy/ConstB. Effect strength = ConstC + Energy/ConstD, capped at MaxRate.

Greater Ignore Defense Rate

Key	Default
GreaterIgnoreDefenseRateConstA	0
GreaterIgnoreDefenseRateConstB	100
GreaterIgnoreDefenseRateTimeConstA	60
GreaterIgnoreDefenseRateTimeConstB	10

Ignore-defense percent gained = ConstA + Energy/ConstB. Duration seconds = TimeConstA + Energy/TimeConstB. Self-only buff. Season 5+ only.

Fitness (Increase Health)

Key	Default
FitnessConstA	16
FitnessConstB	10
FitnessTimeConstA	60
FitnessTimeConstB	10

HP bonus = ConstA + Energy/ConstB, plus the master-tree Fitness Improved bonus. Duration seconds = TimeConstA + Energy/TimeConstB. Affects the caster alone when solo, or every party member in radius when in a party. Season 5+ only.

Greater Defense Success Rate (Increase Block)

Key	Default
GreaterDefenseSuccessRateConstA	2
GreaterDefenseSuccessRateConstB	10
GreaterDefenseSuccessRateTimeConstA	60
GreaterDefenseSuccessRateTimeConstB	10

Block-rate bonus = ConstA + Energy/ConstB, plus master-tree Greater Defense Success Rate Improved. Duration seconds = TimeConstA + Energy/TimeConstB. Solo or party-radius like Fitness. Season 5+ only.

Attack Speed Layering

The global attack-speed formula in Common.dat produces a base delay for every skill. The SkillSpeedScale plugin then layers per-skill adjustments on top:

• SpeedScale (float) multiplies the base delay

• MinDelay clamps the result to at least this many ms

• MaxDelay clamps the result to at most this many ms

Skills not listed in Data/Plugins/Characters/SkillSpeedScale.xml use the raw Common.dat formula output with SpeedScale = 1.0 and no extra clamps. The plugin does not shadow Skill.dat constants; it is strictly a per-skill delay tuner applied after the duration and effect values on this page are computed. See SkillSpeedScale.

Cross-File Dependencies

Setting here	Related in
Per-skill cost, distance, target type, base damage range	Skill.txt
Master-tree add-on bonuses summed into the formulas above	MasterSkillTree.txt
Per-skill base damage tables	SkillDamage.txt
ReflectDamageRate<CLASS> and ReflectDamageMaxRate	Stack with Character.dat ReflectDamageRatePvP / ReflectDamageRatePvM
MagicCircleConstA formula divisor DWMagicDamageMinConstA	Character.dat
SummonMonster1-8	Monster index definitions in Data/Monster/Monster.xml
All <Skill>Rate<CLASS> entries	Class codes mirror Character.dat damage rates
Skill handler attack speed and cooldown	Common.dat global attack-speed formula (MaxAttackSpeed, BaseSkillDelay, SpeedGrowthFactor, MinSkillDelay) in Common.dat
Per-skill delay overrides	SkillSpeedScale plugin. Layers on top, does not replace
Reset-related stat caps that feed Energy into these formulas	Reset System
Combo skill payload that triggers Sword Power and similar skills	CustomCombo

Common Issues

• Buff feels weaker than expected on one class - check the <Skill>Rate<CLASS> entry; it might be below 100

• Buff lasts forever - very large TimeConstA value, or a master-tree count bonus stacking unexpectedly; verify with a fresh cast after restart

• Summoned monster is missing or wrong - SummonMonsterN points to an index that is not in Monster.xml, or the index defines a non-summon-friendly monster

• Reflect never fires - Character.dat ReflectDamageRatePvP / ReflectDamageRatePvM set to 0, or ReflectDamageMaxRate set to 0 here

• Mana Shield absorbs nothing - ManaShieldMaxRate = 0; shipped default is 50

• Sleep lasts longer than the cap - shipped cap SleepMaxTime = 5; lower to shorten

• Fire Slash damage scales with Energy in tests - it does not; the stat is Strength. If players see no scaling from Strength, check that FireSlashConstB is non-zero

• Defense buff "does nothing" - the Defense block is the passive shield-block reduction, not a cast buff; the player must equip a real shield with at least one option for DefenseConstA to apply