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Assassin Cross Dual Dagger (Dancing Knife)

Assassin CrossSustained PvE and boss damageAs of 2026-09-25 (SEA)

Fatal Stab keeps triggering Dancing Knife's blood-blade follow-ups, so this build wants attack speed near 193 and dagger multipliers. It's a safe, reliable general PvE route that can reach around 1.2M DPS on the dummy.

Well sourced

Our take

The RO New World team's own view

  • This is the build we would point most players to for general PvE and bosses: it is reliable, runs mostly on auto-battle and reaches around 1.2M DPS on the dummy. PvP-focused players may prefer Soul Destroyer's range.
  • Push ASPD toward 193 first, with 99 STR then AGI, or 54 STR / 87 AGI plus party buffs and a potion. Then refine the Royal Ice Pick (+13 is a good target) and pair it with a Royal Princess Knife in the off hand.
  • Do not chase rarity over item level: an orange level 70 dagger beats a royal level 55 one. And do not count on Poison Buster against poison-immune MVPs like Doppelganger and Dracula; it is wasted there.
  • Our verdict: the safe all-rounder of the three, cheaper than Soul Destroyer and a better boss pick than Rolling Cutter. The trade-off is its need for near-193 attack speed, which ties up a lot of stat points in AGI.

Stat Priority

  1. 1. STR
  2. 2. AGI

Put 99 STR, then the rest into AGI for Fatal Stab speed. A leaner split of 54 STR / 87 AGI gives about 184-185 ASPD in town, reaching 193 with party buffs and a potion; some players prioritize AGI over STR instead.

Skills

  • Double AttackLv.10

    When attacking or casting some skills with a Knife, there's a 60% chance to increase hit count by 1, but cannot CRIT. While wielding a Jur, increases PDMG by 5%.
  • Double SlashLv.10

    Attacks the target twice. Each hit deals 200%+55 Neutral Melee PDMG to the target and up to 3 enemies within 1.5 m. This skill benefits from Double Attack.
  • Improve DodgeLv.10

    Increases FLEE by 10.
  • HidingLv.5

    Enter stealth mode for 10s, immune to attacks and skill locks, attacking exits Hiding; upon exiting, gain 15 Crit and 15% Crit Damage for 2.5s.Used manually to re-stealth between fights.
  • DodgeLv.5

    Dashes 5 m in the target direction. This skill has 2 charges.Manual escape tool alongside Hiding when things get dangerous.
  • Two-handed MasteryLv.10

    When equipped with 2 knives, increases P.ATK by 10%, and Weapon Size Modifier vs Large becomes 100%.Needed since this build wields two daggers.
  • Fatal StabLv.10

    Requires dual knives. Performs 4 stabs on the target. Each hit deals 210%+160Neutral Melee PDMG to the target and up to 5 enemies in a-4 m rectangular area ahead. This skill benefits from Double Attack.Core attack that triggers Dancing Knife's follow-up blades.
  • Deadly AmplificationLv.10

    Increases Fatal Stab's PDMG Bonus and Hit Rate by 15%.
  • Enchant PoisonLv.5

    Changes own weapon element to Poison. Attacks have a 5% chance to Poison the target for 10 sec. Lasts 600 sec.
  • Enhanced HidingLv.10

    While Invisible, increases MSPD by 20%, FLEE by 20, PDMG Bonus by 52%, and gains immunity to hard control effects. This effect remains for 2 sec after ending Invisibility.
  • Enchant Deadly PoisonLv.10

    Increases P.ATK by 11% and ASPD by 15%. Basic Attack hits have a 10%chance to inflict Deadly Poison for 10 sec. Lasts 600sec. Increases Venom Knife DMG multiplier by 400%.
  • Poison BusterLv.10

    Enters Poison Buster state. For the next 12 sec, increases Poison DMG by 35%. When Poison Buster ends, Deadly Poisoned enemies within 15 m explode, taking 2000%+480 Poison Melee PDMG and immediately settling the Deadly Poison damage left.Extra burst damage; for PvP some players move points here from Dancing Knife instead.
  • Dancing KnifeLv.10

    Blood Blade Attack is triggered when fatal skills hit a target, dealing 1000% Neutral Melee PDMG to the target. Cooldown: 0.8 sec. This skill benefits from Double Attack.Main passive: blood blades trigger automatically after deadly skills like Fatal Stab.
  • Shadow of Deception

    When Invisibile, gain 20% DMG Reduction. This effect remains for 2 sec after Invisibility ends.A near-universal pick; put spare points here.

Rotation

  1. Auto-battle handles basic attack, Poison Buster, Fatal Stab, Enchant Poison and Enchant Deadly Poison; use Hiding and Dodge manually.
  2. A simpler setup just autos basic attack, Fatal Stab and Enchant Deadly Poison.
  3. Re-enter Hiding whenever you can; Enhanced Hiding raises damage on every Assassin Cross build.

Equipment: Mid game

Equipment: End game

Cards

Rune Engine

  • Desperate StrikeSlot 1

    Increases P.ATK and M.ATK by 2~12%. Reduces P.DEF and M.DEF by 2~12%
  • Abnormal Damage BoostSlot 2

    Increases DMG multiplier by 2~12% to targets with abnormal statusPoisoned targets count as an abnormal status, so this boosts damage against anything you've poisoned.
  • Single-Target AmplificationSlot 3

    Increases single-target skill DMG multiplier by 2~12%Boosts Dancing Knife's single-target hits; swap to AoE Amplification if you're leaning on Fatal Stab's area hit instead.
  • Burst AmplificationSlot 4

    Increases burst skill DMG multiplier by 2~12%Adds burst damage; Bloodthirsty Blade is a solid alternative for this slot.
  • Control AssaultSlot 5

    Gain 2~12% ASPD and reduce Variable Chanting by 2~12% for 10s upon being hit. 30s cooldownAdds control-based damage; Balanced Defense is a solid alternative for this slot.

ResonancePrioritize Water (Aqua) level 3, with other elements at level 1; maxing both Wind and Water is also a strong combo for this build.

Relics

  • Relic pairs (resonance bond)

    Fill the Mercy, Slay, Downfall, Vitality, Guard and Bane slots; there's no single stat to chase here, so take whatever helps your resonance bond.

Special Skills (Affixes)

  • Chance Blood BladeAccessory

    When Dancing Knife deals damage, PDMG Bonus +0.6~33% for 10sAnother core damage trait; a good replacement for Multi Stab if you have it instead.
  • Double Blood BladeAccessory

    Dancing Knife's coordinated attack blood blades are doubled, but damage multiplier is reduced by 28~49.6%A core damage trait for this build; a level 2 roll on Rogue's Treasure works well.
  • Rapid VenomAccessory

    Poison DMG +0.8~44%Adds Poison damage, +28% at level 2 orange, which boosts every poison skill in this build.
  • Venom MasterAccessory

    When dealing damage, has a 15% chance to Poison the target. Damage multiplier dealt to Poisoned targets +0.6~33%
  • Fortified GuardArmor

    When casting a defensive skill, P.DEF and M.DEF +0.7~38.5% for 10s.
  • Shadow ResistanceCloak

    Shadow DMG taken -0.5~27.5%.
  • Decaying ToxinWeapon

    Damage multiplier dealt to Poisoned targets +0.6~33%. Poisoned targets have MSPD -15%Adds damage to poisoned targets; a level 2 orange roll gives 21%, which stacks well with this build's poison enchants.
  • Rapid StabWeapon

    After casting Fatal Stab, ASPD +0.8~44% for 5s.Grants extra ASPD after Fatal Stab, around 28%, keeping Dancing Knife procs coming faster.

Apocalypse Traits

  • CRIT BladeWeapon

    Dancing Knife can trigger CRIT, but Crit Damage is reduced by 20~45%, and dealing damage to players grants CRIT +50.Not available in SEA yet. It would let Dancing Knife land critical hits, at -20% CRIT damage.

Pets

Tips

  • The off-hand dagger's special skill is sealed and doesn't activate; some players believe swapping it after a map change makes it work, but that's unconfirmed.
  • A F2P-friendly variant combines Dark Moment with Dancing Knife for mobile AoE farming.
  • A hybrid combining Rolling Cutter and Dancing Knife (royal Ice Pick in both hands, Chance Blood Blade + Spinning Fan of Knives) works for PvE but is expensive to gear.
  • Poison Buster adds damage in PvP but is wasted against poison-immune MVPs like Doppelganger and Dracula.

Sources