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Sydax King Killer
Legendary Dark Elves Spirit Defense

Sydax King Killer — guide

The Corrupted
VerdictLevel up
5/5
Speed99HP18825Defense1465Attack859
Clan Boss5
Hydra5
Chimera5
Arena3.5
Dungeons5
Hard dungeons5
Doom Tower4
Faction Wars4.5
RAID GURU Editorial Updated: 22.10.2026 0 reviews

Guide: Sydax King Killer

In short

Sydax King Killer is a legendary Defense champion from the Dark Elves (Fallen), combining powerful debuffs, team protection, and DEF-based damage. He excels in Clan Boss, Hydra, Chimera, and high-level PvE. Build priority: DEF, SPD, ACC.

Strengths

  • Applies two strong debuffs with A1 (Decrease ATK 50% and Pain Link) at up to 100% chance.
  • Two-hit AoE A2: places Decrease DEF 60% on first hit, Decrease SPD 30% on second hit.
  • Massive team support via A3: Increase DEF 60%, Increase SPD 30%, and Ally Protection 50% for all allies except himself.
  • Passive reduces incoming damage by 10% per ally under Ally Protection; immune to Pain Link and Reflect Damage.
  • All Battles Aura: +30% DEF for the whole team — an enormous survivability boost.

Weaknesses

  • Low base SPD (99) requires significant gear investment.
  • ACC-dependent for landing debuffs (especially critical for A2).
  • Needs skill tomes to reach 100% debuff chance and reduce cooldowns.
  • In Arena (3.5) his supportive nature doesn't match pure nukers; playable but not optimal.

Where to use

Ratings (0–5):

  • Clan Boss (5.0) — top-tier, with all necessary tools for survivability and damage.
  • Hydra (5.0) — exceptional, lands crucial AoE debuffs and protects the team.
  • Chimera (5.0) — ideal support/debuffer.
  • Dungeons (5.0): Spider's Den, Dragon's Lair and others — great for speed runs and hard modes.
  • Doom Tower: Hard (5.0) — one of the best; Normal (4.0) — good, but less needed.
  • Faction Wars: Dark Elves Crypt (4.5) — reliable carry.
  • Arena (3.5) — viable but not a priority.

Stats and gear

Stat priority: DEF (4000+ for damage and survival), SPD (200+, aim for 240+), ACC (250+ for dungeons, 350+ for hard DT), CRATE (100%), CDMG (as high as possible). Secondary: HP%, RES.

Recommended sets: Savage / Lethal for maximum damage; Protection for stronger team buffs; Stoneskin for PvP; also Merciless, Slayer Rathalos, Mercurial.

Relics: The Cat's Gaze (CRATE & CDMG) or Irethi Coronet (DEF & ACC). Other listed relics can be used based on needs.

Masteries and blessings

Mastery trees: Offense and Support. Key nodes:

  • Offense: Pierce Defenses (ignore DEF on crits), Bloodthirsty Prowess, Rolling Force, Extra Punishment, Boss Slayer.
  • Support: Critical Bolster (heal on buff application), Strength Sap (reduce enemy ACC on debuff), Gathering Momentum (turn meter fill).

Blessings: Crushing Rend (extra damage based on enemy DEF) or Cruelty (damage amplification on debuffed targets) for damage; Brimstone for HP burn in Clan Boss; Lightning Cage and Nature's Wrath are situational.

Tomes

Book A2 (Cruel Executioner) first — to guarantee 100% debuff chance and shorter cooldown. Then A3 (Slave Bond) for cooldown reduction to 3 turns. A1 last for extra damage and chance.

Verdict

Sydax King Killer is one of the strongest defensive champions in the game, capable of carrying all PvE content. A must-build for anyone aiming to clear Clan Boss, Hydra, and Chimera on the highest difficulties.

Build

Artifact sets
SavageLethalProtectionStoneskinSlayer RathalosMercilessMercurial
Key masteries
Pierce DefensesCritical BolsterStrength SapUnrelenting PowerGathering MomentumRolling ForceExtra PunishmentBloodthirsty ProwessBoss Slayer
Blessings
Crushing rendCrueltyBrimstoneLightning cagenature wrath
Relics
Blackshroud FanDiadem of UndeathIrethi CoronetThe Cat's GazeMurderfangVigor Mortis
Best in
Spider's DenDragon's LairDark Elves CryptHydraChimera

The build is a guideline: the first sets in the list fit most often. Adapt it to your artifacts and goals.

Skills

Saidax the Kingslayer is a Legendary Champion in RAID: Shadow Legends from the Dark Elves (The Corrupted) faction, role — Defense, affinity — Spirit.

Skills

SkillDescriptionLevel Upgrades

Flesh Cleaver

Attacks an enemy. Has an 80% (100%) chance to place a 50% Decrease ATK debuff and Pain Link for 2 turns.
Damage based on [DEF] = 3.9 × [DEF]

Effects: Pain Link, 50% Decrease ATK

Lvl 2 Damage +5%
Lvl 3 Damage +5%
Lvl 4 Debuff Chance +10%
Lvl 5 Debuff Chance +10%

Cruel Executioner

Cooldown: 4 turns

Attacks all enemies 2 times. The first hit has a 75% (100%) chance of placing a 60% Decrease DEF debuff for 2 turns. The second hit has a 75% (100%) chance of placing a 30% Decrease SPD debuff for 2 turns.
Damage based on [DEF] and [enemy MAX HP] = 1.5 × DEF + 0.035 × MAX HP (2 times)

Effects: 60% Decrease DEF, 30% Decrease SPD

Lvl 2 Damage +10%
Lvl 3 Damage +10%
Lvl 4 Debuff chance: +10%
Lvl 5 Debuff chance: +15%
Lvl 6 Cooldown -1

Slave Bond

Cooldown: 5 turns

Places a 60% Increase DEF buff and a 30% Increase SPD buff on the team for 2 turns. Grants all team members except this Champion a 50% Ally Protection buff for 2 turns.

Effects: 60% Increase DEF, 30% Increase SPD, 50% Ally Protection

Lvl 2 Cooldown -1
Lvl 3 Cooldown -1

Life's Resilience [P]

Receives 10% less damage for each ally under an Ally Protection buff. Has immunity to Pain Link, as well as to damage from Reflect Damage and passive Reflect Damage effects.

Effects: Reduces incoming damage

AuraIncreases Ally DEF in all battles by 30%.

Where to get

Sacred Shardmain source
Ancient Shardvery rare chance
Events and fusionsstay tuned

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