Dragon of Death Ragnakeus is a challenging two-phase world boss that requires precise team coordination and timing. This guide covers strategies for defeating this boss up to the Extreme League.
Dragon of Death Ragnakeus
Dark
StrikerLv.80Immunities
Pulverizing Dragvider
Attacks all enemies. After attacking, increases Priority of the caster by 40%.
Roaring Breathstream
Attacks all enemies. After attacking, gains an extra turn, and increases Defense for 4 turn(s).
Proclaimed Deathstroy
Removes all buffs from all enemies, and deals 95% of the target's Max Health as fixed damage to 
Light and Dark enemies and attacks all enemies.
This skill does not miss.
Dragon of Death Ragnakeus
(Passive Effect)
Increases damage taken from 
Fire, 
Water, and 
Earth enemies. Reduces Speed of Light and Dark enemies. This effect cannot be removed.
When hit, increases Priority of the caster by 20%.
Reduces Weakness Gauge damage taken from skills other than Burst Skills, Dual Attacks, and Skill Chains by 50%. When granted increased Defense, reduces Weakness Gauge damage taken by 100%.
Recovers 10% Weakness Gauge every turn.
Damage from Cursed/fixed damage does not exceed 10000/20000 respectively. (Excludes fixed damage from Skill Chains)
Greatly increases damage dealt inversely proportional to the number of targets.
Enemies killed by Dragon of Death Ragnakeus cannot be Resurrected or Revived.
Emperor of Armageddon
(Passive Effect)
Grants Courage Against Despair to the enemy team. Grants a special effect to the enemy team based on their class.Striker: +50% Priority recovery efficiency
Mage: Increased damage
Defender: Inflicts reduced Defense on the Boss for 4 turns when performing an action
Ranger: Inflicts reduced Resilience on the Boss for 4 turns when performing an action
Healer: Fixes Priority recovery efficiency of the Boss to 60%
Mecha Dragon of Death Ragnakeus
LightStrikerLv.110Immunities
Corroding Dragvider
Attacks all enemies. After attacking, increases Priority of the caster by 70%.
Eroding Breathstream
Attacks all enemies. After attacking, when the caster is not inflicted with Reduced Defense, resets the skill cooldown of Caustic Deathstroy.
After attacking, gains an extra turn.
Caustic Deathstroy
Removes all buffs from all enemies, and deals 95% of the target's Max Health as fixed damage to non-Light and non-Dark enemies and attacks all enemies. Gains a barrier for 8 turn(s).
This skill does not miss.
Mecha Dragon of Death Ragnakeus
(Passive Effect)
Increases damage taken from Light and Dark enemies. Reduces Speed of Fire, Water, and Earth enemies. This effect cannot be removed.
When hit, increases Priority of the caster by 30%.
Reduces Weakness Gauge damage taken from skills other than Burst Skills, Dual Attacks, and Skill Chains by 50%. When granted a barrier, reduces Weakness Gauge damage taken by 100%.
Recovers 10% Weakness Gauge every turn.
Damage from Cursed/fixed damage does not exceed 10000/20000 respectively. (Excludes fixed damage from Skill Chains)
Greatly increases damage dealt inversely proportional to the number of targets.
Enemies killed by Mecha Dragon of Death Ragnakeus cannot be Resurrected or Revived.
Emperor of Ruin
(Passive Effect)
Grants Courage Against Despair to the enemy team. Grants a special effect to the enemy team based on their class.Striker: Increased damageMage: +50% Priority recovery efficiencyDefender: Inflicts reduced Defense on the Boss for 4 turns when performing an actionRanger: Inflicts reduced Resilience on the Boss for 4 turns when performing an actionHealer: Inflicts reduced Speed on the Boss for 4 turns when performing an action
Strategy
- •The boss's main characteristic is its . Fast units are recommended.
- •Anything that can limit priority gain is useful: , , the weapon, or Demiurge Vlada (20% reduction at 4 stars, 50% at 5 stars).
- •Like most World Bosses, the best strategy is to break the boss as often as possible. Key focus areas are CP generation and Weakness Gauge damage.
Phase 1
- •Bring , , or to counter boss .
Phase 2
- •Bring , , or to counter boss .
- •Defender recommended to prevent the S3 reset if you want to bring Fire, Earth, Water.
Phase 1 — Recommended Characters
Nice and .
Fran, Laplace, Tamamo-no-Mae, Ryu Lion
Starter/Finisher options.
Luna, Caren, Christina, Ryu Lion, Poolside Trickster Regina
and options.
Can the boss (breaking the boss clears it).
Phase 2 — Recommended Characters
Healer with .
Defender with nice CP generation and on S1.
Starting from 4 stars, reduces priority gain efficiency by 20% (50% at 5 stars).
Gnosis Nella, Demiurge Stella, Iota, Ryu Lion
Starter/Finisher options.
options to stall his S2.
gives to the whole team.
Suggested Teams
Phase 1
