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Boss DMG Reduction Codex

Registering these items in the Codex raises Boss DMG Reduction. One registration grants from +0.3% to +0.9%. The largest, Black Demon Army Slayer [4], needs [R] Black Demon Army Forsaken Helmet, [R] Black Demon Army Forsaken Cape, [R] Black Demon Army Forsaken Ring.

TitleRequired ItemsClassEffect
Spirit's Support [7]Carapace BeetleknightLantern Master LamphundBunny Guru HoppyCanine Boss WooftainCelestial Cat NirvameowAll classesBoss DMG Reduction +0.3%
Beginner Raider's Boss Defense Ability [1][UC] Bicheon Challenger's Helmet+1[UC] Bicheon Challenger's Cape+1All classesBoss DMG Reduction +0.3%
Spirit's Support [8]Ocean Lord GoonsterWarrior God GenerowlBull Master MoomooHip Wizard PottamusDisguise Master ChachaMonkey King ApestaffDark Serpent MoslaAll classesBoss DMG Reduction +0.3%
Beginner Raider's Boss Defense Ability [2][UC] Bicheon Challenger's Helmet+3[UC] Bicheon Challenger's Cape+3[UC] Snake Pit Challenger's Cape+3[UC] Spiritual Center Challenger's Cape+3All classesBoss DMG Reduction +0.3%
Value of Uncommon Treasure [7]Viperbeasts Chief's Inverted ScaleVengeful Soul Crystal ShardNefariox HornEndless Redmoon Devil SwordCentipedeus HuskPorkinator's WhetstoneAll classesBoss DMG Reduction +0.3%
Beginner Raider's Boss Defense Ability [3][UC] Bicheon Challenger's Helmet+4[UC] Bicheon Challenger's Cape+4[UC] Snake Pit Challenger's Cape+4[UC] Spiritual Center Challenger's Helmet+4[UC] Spiritual Center Challenger's Cape+4[UC] Phantasia Challenger's Helmet+4All classesBoss DMG Reduction +0.3%
Value of Uncommon Treasure [8]Tarnished Blue Violet BellTarnished Lightning BellTarnished Vermilion Bird's BeadEndless Celestial SwordEndless Celestial ArmorTarnished Blue Dragon's BeadAll classesBoss DMG Reduction +0.3%
Skilled Raider's Boss Defense Ability [1][R] Bicheon Challenger's Helmet+1[R] Bicheon Challenger's Cape+1[R] Snake Pit Challenger's Cape+1All classesBoss DMG Reduction +0.3%
Darkscourge Spectre's Secret Battlegear [4][R] Black Demon Army Forsaken Cape+1All classesBoss DMG Reduction +0.3%
Spirit's Courage [1]Serenity AkkaOinker PiggioAll classesBoss DMG Reduction +0.3%
Skilled Raider's Boss Defense Ability [2][R] Bicheon Challenger's Helmet+3[R] Bicheon Challenger's Cape+3[R] Snake Pit Challenger's Cape+3[R] Spiritual Center Challenger's Cape+3All classesBoss DMG Reduction +0.3%
Spirit's Courage [2]Vampiric Bat DracusipLittle Azure Dragon HoryongSoul Messenger LamperAll classesBoss DMG Reduction +0.3%
Skilled Raider's Boss Defense Ability [3][R] Bicheon Challenger's Helmet+5[R] Bicheon Challenger's Cape+5[R] Snake Pit Challenger's Cape+5[R] Spiritual Center Challenger's Helmet+5[R] Spiritual Center Challenger's Cape+5[R] Bicheon Conqueror's Ring+5All classesBoss DMG Reduction +0.3%
Spirit's Courage [3]Verdant Angel FloryViolent Monk TaugonWild Charger SeahorserAll classesBoss DMG Reduction +0.3%
Spirit's Courage [4]Greenfinch RingringThree Tailed Snow FoxSkeleton Lionheart OroonkiRed Wolf DoggoMillennial Fox SolariAll classesBoss DMG Reduction +0.3%
Vanquisher of Darkscourge Spectre [4][R] Black Demon Army Forsaken Helmet+2[R] Black Demon Army Forsaken Cape+2All classesBoss DMG Reduction +0.6%
It's Only Treasure If It's Rare [1]Viper Queen's Inverted ScaleVengeful Soul's CrystalNefariox Stormer CPT HornStarless Redmoon Devil SwordAll classesBoss DMG Reduction +0.3%
It's Only Treasure If It's Rare [2]Pseudodragon God HuskPorkiechop's WhetstoneBlue Violet BellLightning BellAll classesBoss DMG Reduction +0.3%
It's Only Treasure If It's Rare [3]Vermilion Bird's BeadStarless Celestial SwordStarless Celestial ArmorBlue Dragon's BeadAll classesBoss DMG Reduction +0.3%
Black Demon Army Slayer [4][R] Black Demon Army Forsaken Helmet+4[R] Black Demon Army Forsaken Cape+4[R] Black Demon Army Forsaken Ring+3All classesBoss DMG Reduction +0.9%
Value of Rare Treasure [11]Soul Messenger LamperVerdant Angel FloryThree Tailed Snow FoxRed Wolf DoggoDemonic Cult TomeWhite Tiger's BeadBlack Tortoise's Bead[R] SpectrumiteAll classesBoss DMG Reduction +0.3%
Master Raider's Boss Defense Ability [1][E] Bicheon Challenger's Helmet+2[E] Bicheon Challenger's Cape+2[E] Snake Pit Challenger's Helmet+2[E] Snake Pit Challenger's Cape+2All classesBoss DMG Reduction +0.3%
Master Raider's Boss Defense Ability [2][E] Bicheon Challenger's Helmet+4[E] Bicheon Challenger's Cape+4[E] Snake Pit Challenger's Helmet+4[E] Snake Pit Challenger's Cape+4[E] Spiritual Center Challenger's Cape+4All classesBoss DMG Reduction +0.3%
Master Raider's Boss Defense Ability [3][E] Bicheon Challenger's Helmet+5[E] Bicheon Challenger's Cape+5[E] Snake Pit Challenger's Cape+5[E] Spiritual Center Challenger's Helmet+5[E] Spiritual Center Challenger's Cape+5[E] Phantasia Challenger's Helmet+5All classesBoss DMG Reduction +0.3%
Master Raider's Boss Defense Ability [4][E] Bicheon Challenger's Helmet+6[E] Bicheon Challenger's Cape+6[E] Snake Pit Challenger's Cape+6[E] Spiritual Center Challenger's Helmet+6[E] Spiritual Center Challenger's Cape+6[E] Phantasia Challenger's Helmet+6[E] Spiritual Center Conqueror's Ring+6[E] Phantasia Conqueror's Ring+6All classesBoss DMG Reduction +0.3%
Worth the Fight [1]Absolute Beauty WhaleyGem Mania ShaoshaoAssassin NyanjaViperbeasts Chief's Bloody Inverted ScaleVengeful Soul's Crystal SealNefariox Chief's HornBoundless Redmoon Devil SwordAll classesBoss DMG Reduction +0.3%
Worth the Fight [2]White Peacock CrystalglassThunder Beast BaratanGolden Bird SuparnaFive Dragon God HuskPorkulus' WhetstoneShining Blue Violet BellShining Lightning BellAll classesBoss DMG Reduction +0.3%
Worth the Fight [3]Lucky Cat LucksterGlowing Gem SparklerFire Devil FlamehornSoul Harvester ReaperShining Vermilion Bird's BeadBoundless Celestial SwordBoundless Celestial ArmorShining Blue Dragon's BeadAll classesBoss DMG Reduction +0.3%
Worth the Fight [4]Soul Harvester ReaperSealed Demonic Cult Tome[E] SpectrumiteAll classesBoss DMG Reduction +0.3%
Worth the Fight [4]Soul Harvester ReaperAssassin NyanjaAll classesBoss DMG Reduction +0.3%
Worth the Fight [5]Radiance Dragon MirBrutal Lionheart KoigaShining White Tiger's Bead[E] SpectrumiteAll classesBoss DMG Reduction +0.3%
Worth the Fight [6]Thunder Beast BaratanGolden Bird SuparnaGlowing Gem SparklerFire Devil FlamehornShining Black Tortoise's Bead[E] SpectrumiteAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [1]Absolute Beauty WhaleyThunder Beast BaratanRadiant Black Tortoise's BeadDestruction Crystal CoreAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [2]White Peacock CrystalglassLucky Cat LucksterVigor Crystal CoreMana Crystal CoreAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [3]Fire Hawk GoldkingViper Queen's Bloody Inverted ScaleVengeful Soul's Crystal CoreNefariox Grand Chief HornAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [4]Butterfly Fairy DreamflyShadowless Redmoon Devil SwordAncient Dragon God HuskPork Supremo's WhetstoneAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [5]Dark Stallion GrifforseRadiant Blue Violet BellRadiant Lightning BellRadiant Vermilion Bird's BeadAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [6]Resurrector DarknyanShadowless Celestial SwordShadowless Celestial ArmorRadiant Blue Dragon's BeadAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [7]Ghost Knight StyxViper Queen's Bloody Inverted ScaleVengeful Soul's Crystal CoreNefariox Grand Chief HornAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [8]Grand GEN KhalionShadowless Redmoon Devil SwordAncient Dragon God HuskPork Supremo's WhetstoneAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [9]Wind Summoner GalesoulRadiant Blue Violet BellRadiant Lightning BellRadiant Vermilion Bird's BeadAll classesBoss DMG Reduction +0.3%
Essential Companions in a Boss Fight [10]Hell Lord InfernoShadowless Celestial SwordShadowless Celestial ArmorRadiant Blue Dragon's BeadAll classesBoss DMG Reduction +0.3%