Defense Ratio (DR) Guide

TL;DR

Every physical attack uses the same formula: (Attacker HR / Target DR) × 50, clamped 15%–99%. Your DR comes from DEX × 1.5 + gear + shield spells. Your HR comes from Weapon Skill + DEX above 50 + gear. Back attacks halve the target's DR. After a hit connects, armor, shield, and VIT further reduce damage.

The Hit Chance Formula

Both attacking and defending use the same formula. Whether you're a warrior swinging at a Liche or a Demon swinging at you — the math is identical:

Hit Chance = (Attacker's HR / Target's DR) × 50

Clamped between 15% (minimum) and 99% (maximum)
Back Attack: If the attacker is behind the target (both facing the same direction), the target's DR is halved. This doubles the effective hit chance. Always face your attacker in PvP.

Your Defense Ratio (Avoiding Hits)

Your Defense Ratio determines how often enemies miss you. Higher DR = more dodges.

SourceHow It WorksExample
DEX StatBase DR = DEX × 1.5DEX 100 = 150 DR
AddDR (gear)Bonus DR from equipped itemsVaries
Defense-ShieldCircle 3 spell, +40 DR150 + 40 = 190
Great-Defense-ShieldCircle 6 spell, +100 DR150 + 100 = 250
Your DR = (DEX × 1.5) + AddDR + Shield Spell bonus
Defense Calculator
Your DR: 150 — Attacker hits you 50% of the time (back attack: 99%)
What Happens When a Hit Lands

DR only determines if the attack connects. After that, damage passes through these layers:

1. VIT: absorbs random 0 to (VIT / 10 - 1) flat damage
2. Armor: random body part absorbs up to 80% (halved in PvP)
3. Shield: if Shield Mastery procs, absorbs up to 80%
4. AddAbsPD: items reduce up to 50% additional
Body PartChanceMax Absorption
Body / Full Body50%80%
Pants + Leggings25%80%
Arms12.5%80%
Head12.5%80%
Example: Attacker HR 180 vs your DR 240 → 37% hit chance. Hit lands with 100 raw damage. VIT 80 absorbs 4 → 96. Body armor 60% absorbs 57 → 39. Shield procs, absorbs 31 → 8 damage taken.

Your Hit Ratio (Landing Hits)

When you attack, your Hit Ratio determines how often you connect.

SourceHow It WorksExample
Weapon SkillYour equipped weapon's skill level is the baseSword 100 = base 100
DEX StatOnly counts above 50. Each point over 50 adds +1. DEX ≤ 50 adds NOTHING.DEX 100 = +50
AddAR (gear)Attack Rating bonus from equipped itemsVaries
Your HR = Weapon Skill + (DEX - 50 if DEX > 50) + AddAR
Attack Calculator
Your HR: 150 — You hit the target 37% of the time (back attack: 75%)

NPC Defense Ratio Table

Defense Ratio for every NPC. Use the calculator above to check your exact hit chance — just copy the DR value into "Target DR".

Low Level (10–20)

NPCDRDifficulty
Slime20Easy
Rabbit20Easy
Giant-Ant30Easy
Cat40Easy
Amphis60Easy
Orc75Easy

Mid Level (20–40)

NPCDRDifficulty
Scorpion70Easy
Orc-Mage70Easy
Zombie80Medium
Skeleton80Medium

Mid-High Level (40–60)

NPCDRDifficulty
Troll85Medium
Hellhound90Medium
Giant-Frog90Medium
Clay-Golem100Medium
Cyclops100Medium
Stone-Golem110Medium

High Level (60–90)

NPCDRDifficulty
Cannibal-Plant80Medium
Beholder100Hard
Orge150Hard
Mountain-Giant250Hard

Endgame (90+)

NPCDRDifficulty
WereWolf180Hard
Stalker200Hard
Dark-Elf200Hard
Liche300Extreme
Ettin350Extreme
Demon450Extreme
Unicorn450Extreme
Gagoyle450Extreme

Bosses

NPCDRDifficulty
Hellclaw450Extreme
Tigerworm550Extreme
Wyvern1,000Extreme
Fire-Wyvern1,000Extreme
Abaddon1,500Extreme

Apocalypse Monsters

NPCDRDifficulty
Giant-Plant120Medium
Giant-Crayfish150Hard
Tentocle150Hard
Claw-Turtle200Hard
MasterMage-Orc300Extreme
Nizie300Extreme
Barlog400Extreme
Giant-Lizard400Extreme
Centaurus450Extreme
Minotaurs500Extreme

Special / Other

NPCDRDifficulty
DireBoar80Medium
Rudolph100Medium
Ice-Golem100Medium
Frost300Extreme

Crusade Units

NPCDRDifficulty
Archer Guard Tower50Easy
Cannon Guard Tower50Easy
Mana Stone50Easy
Detector Tower50Easy
Catapult50Easy
Town Guards150Hard
Gate800Extreme
Grand Magic Generator5,000Extreme
Reality Check: Reaching 99% hit chance against endgame bosses is nearly impossible through HR alone. Against Wyvern (DR 1,000) you'd need HR 1,981. Focus on back attacks (halves DR) and party tactics.

Quick Reference

HR Needed for 99% vs NPC DR
NPC DRHR for 99%Example NPCs
20–4040–80Slime, Cat, Rabbit
75–100149–199Orc, Skeleton, Cyclops
150298Orge, Giant-Crayfish, Guards
200397Stalker, Dark-Elf, Claw-Turtle
300595Liche, MasterMage-Orc, Frost
450892Demon, Unicorn, Centaurus
1,0001,981Wyvern, Fire-Wyvern
1,5002,971Abaddon
DR Needed to Cap Enemy Miss Rate (PvP)
Attacker HRDR for 15%DR for 30%DR for 50%
8026713380
100333167100
150500250150
200667333200
250 (Super)833417250
DR vs MR: Same Formula, Different Stats
Physical (DR)Magic (MR)
DefenseDEX × 1.5 + gear + shield spellNPC's fixed MR value
AttackWeapon Skill + DEX above 50 + AddARMagic Skill + MAG above 50 + AddAR
BoostDefense-Shield (+40) / Great-Defense-Shield (+100)N/A (MR is fixed)
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