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Cthulhu.jpg Elemental Resistances














- Drain Drain Drain Drain Weak Null
Rarity Race Grade AI
5★ Vile 97 Attack
6★ Stats
HP 1347 (12/365) Vitality 208 (12/365)
Strength 81 (324/365) Agility 151 (153/365)
Magic 220 (14/365) Luck 175 (22/365)
PATK 500 PDEF 599
MATK 792 MDEF 668
Innate Skills
Passive.png Almighty Survivor Passive +15% to Almighty damage and HP stops at 1 HP upon receiving the first killing blow.
Passive.png Call of R'lyeh Passive Adds Null Mortal. Increases damage dealt to enemies inflicted with Gloom by 30%.

Activates the following Chain Effect when attacking first at the beginning of a battle:
Inflicts 10% fractional damage (200 max) on all enemies based on their current HP and reduces MP by 1.
Activates the following Chain Effect at the beginning of a battle if the enemy attacks first:
Reduces 2 enemy Press Turn Icons. (Only up to 2 Press Turn Icons can be reduced by skills or effects.)
Activates the following Chain Effect at the start of enemy turn:

Inflict Gloom on all enemies. (1 turn)
Almighty.png Lost Sanity 6 MP Inflicts Almighty (Magic) damage (Power: 120) on all enemies with 50% chance to inflict Bind and Charm on hit enemies, and reduces MP by 2.
Gacha: -
Awaken: Almighty.png Ars Magna 8 MP Inflicts Almighty (Magic) damage (Power: 200) on a single enemy.
Gacha: Passive.png Almighty Debuff Passive +15% to Almighty damage. +15% chance to inflict status ailments.
Awaken: Passive.png Suk Flexi Passive Activates the following Chain Effect when attacking first at the beginning of a battle: Increases own party's EV/AC by 20%. (3 turns)
Activates the following Chain Effect at the beginning of a battle if the enemy attacks first: Reduces EV/AC of all enemies by 20%. (3 turns)
Gacha: Passive.png Epitome of Madness Passive +15% chance to inflict status ailments, +15% to EV.
Awaken: Passive.png Epitome of Fortitude Passive +20% to max HP, -50% to Critical hit rate of damage received.
Gacha: Passive.png Butcher Passive +20% damage to skills that target all or random enemies.
Awaken: Passive.png Null Light Passive Adds Light Null.
Gacha: Passive.png Null Charm-Poison Passive Adds Null Charm and Null Poison.
Spirit Merge Panel Upgrades
Panel 1 Panel 2 Panel 3
Panel Completion Bonus Adds Null Bind. -20% to Fire, Ice, Elec & Force damage received. Activates the following Chain Effect when an enemy is inflicted with Gloom: Reduces ATK/DEF of all enemies by 20%. (2 turns) +20% to Almighty damage. +20% to max HP.
Panel Step Stat Bonus HP: +250(MAX) Mag ATK: +100(MAX) HP: +250(MAX)


Used In Fusions
Link to Fusion Calculator

  • Only available from a banner specific event.
  • Available as a gacha.

Cthulhu/Sword Cthulhu/Shield

  Info   Builds   Lore    

Role Summary

Name Best Archetype(s) PVE PVP Democalypse
PVE PVP Offense Defense Prelim Boss
Cthulhu.jpg Cthulhu
Yellow Purple Yellow Purple 3 5 5 3 3
  • Disgustingly flexible, with Call of R'lyeh offering TWO Intimidating Stance turn removals if he goes second, reducing enemy MP if he goes first along with chip damage, gives him Null Mortal, inflicts Gloom on the opponent at the start of their every turn, and offers a 30% damage boost to enemies afflicted by Gloom
  • As if that weren't enough MP drain, Lost Sanity accuractely describes the sanity of the devs at this point, being Megidolaon, an improved Mahamarin Karinon and Mahashibabooon, and a 2 MP removal all in one. Did I mention that instead of 8 mp cost like Megidolaon, it costs 5 mp at max level?
  • In theme with his kit, Suk Flexi offers different effects depending on whether or not he goes first, furthering his role as a midrange monster, and helping in the current meta where evasion can be king.
  • Panels increase his tankiness and almighty damage, while also offering additional buff control and Null Bind, so his chain effect to apply Gloom will always activate.
  • Has a great stat spread, with high Magic, Luck, Vitality, and middling Agi, which suits him perfectly as his kit doesn't care if he goes first or second.
  • Has innate Almighty Survivor for additional survivability and damage, because at this point what else does he need?
  • Oh, that's right, to match Nyarlathotep, he has four drain effects, giving him incredible anti-pierce capacity.
  • If he goes first, he won't have Gloom on the opponents without Nyarlathotep on your first turn, which is worth considering.
  • Suk Flexi is a skill name so terrible it gives Great Idea or the Slowda skills a run for their money.
  • He does suffer slightly from being a bit of an all rounder, in that he's too fast for a dedicated slow team, while not offering enough to run in a dedicated fast team, as even his mp drain in that case probably won't be enough to keep a T1 team alive if they fail to sweep.
  • Not particularly special in PvE where enemies have unlimited MP, and Charm and Bind are virtually impossible to land on high level enemies.
Notes -

PvE Builds

PvP Builds


  • Yellow: Suk Flexi for EV/AC buff control to go alongside Gloom.
  • Purple: HP modifier + crit resistance modifier to make him tankier.
  • Teal: Null Light to cover his weakness, especially against VishnuA.

Skill Transfers

Damage Boosters to dish out as much damage as possible. Passives since his base kit already offers so much.

Damage Boosters:

  • Almighty Debuff: Almighty damage modifier + ailment infliction moddifier. Perfect for Lost Sanity.
  • Almighty Boost: Almighty damage modifier.
  • Butcher: AOE damage modifier.
  • Serial Killer: Early game/budget option.


  • Epitome of Endurance: HP modifier + reduces team speed to trigger Call of R'lyeh's double IS more often.
  • Evade: Highest evasion modifier. Pairs well with Gloom to make him a dodge unit.
  • Epitome of Madness: Evasion modifier + ailment infliction modifier.
  • Life Surge: Highest HP modifier.
  • Wild Instinct: Highest Crit resistance modifier.
  • Auto/Lunar Skills: Provide extra buff control. Lunar skills pair well with Call of R'lyeh. Auto-Sukuka/Sukunda especially, to ensure evasive units have the best chance to dodge attacks.
  • Null ailments: Null Charm to ensure Cthulhu doesn't nuke his own team with Lost Sanity. Null Mute so he can always use Lost Sanity.
  • Infernal Mask: Overall ailment immunity.
  • Life Gain: Early game/budget option.
  • Dodge: Early game/budget option.
  • Hellish Mask: Early game/budget option.

Other/Misc. Skills:

  • Null Light: To cover his weakness if not running Teal.
  • Enduring Soul/+: Added endure if needed.


  • Stat priorities: Mag ATK%, HP%, Phys EV%.
  • Life: Adds more bulk.
  • Spell: Boosts damage output.
  • Divine: Allows him to spam Lost Sanity.
  • Ward: Protects him from ailments for 3 turns.
  • Dodge: Grants him added evasion, pairs well with Gloom.
  • Guard/Shield: Adds Phys/Mag DEF if needed.


  1. MAG (20): To boost damage output.
  2. VIT (20): Adds bulk.
  3. LUK (10): Increases chance to inflict ailments and evasion. Reduces chances of being crit and receiving ailments.


Call of Cthulhu
ArchPurple.png Transferred Skills Notes:

An insanely strong demon. Gloom aids dodge tanks greatly especially when paired with a dodge tank Demiurge, who has Drain Pierce for Cthulhu's 4 elemental drains. This is a generic build to fulfill the role of a damage dealer + double IS + Gloomer. Teal can be ran to not let VishnuA to gain extra turns, if not, run a demon that Drains/Repels Light with Demiurge.

Almighty Debuff Epitome of Endurance
Infused Mitama
Ma 20 Vi 20 Lu 10
Spell/Divine/Life + Ward with Mag ATK%
Target Stats

Cosmic Horror
ArchYellow.png Transferred Skills Notes:

A dodge build variant. Suk Flexi + any Lunar Skill will ensure neutral EV/AC buffs on both sides at minimum. You can run Lunar Downfall or Auto-Sukuka/Sukunda to ensure EV/AC buffs are in your favor. Pair with another dodge build demon to really punish Physical teams. Teal can be ran instead to not get punished by VishnuA, but make sure you have other forms of EV/AC buff control.

Lunar Prosperity Evade
Infused Mitama
Ma 20 Vi 20 Lu 10
Spell/Divine/Life + Dodge with Mag ATK%
Target Stats