Hell's Park Underside/Spike Hell Area/Fire

Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.

Sources

Recommended demons

Follow the selected challenge’s roster/archetype rules. Special bonuses require the matching Underside skill, not merely the same demon name. Kill King Frost first with Fire damage before the MP drain snowballs; use Divine brands where needed.

Earlier recommended alternatives

PhoenixBanner exclusive

Banner: first-turn Fire burst

Fire Tornado’s repeated area damage targets the King Frost-first plan, and Fire Pierce avoids blocked hits.

Needs: Build MATK/MP for a first-turn clear. Banner option for unrestricted clears only; not legal for a fusible-only or 4★-only challenge.

Watch for: His first-strike benefits require enough battle speed. Do not let King Frost survive to drain the team’s MP.

Earlier recommended alternatives

BaphometAlternative

Area-specific option

Use Fire attacks and the matching Underside skill where available. For Phys, Cerberus also supplies Intimidation through Hell Claw.

Earlier recommended alternatives

Huang LongAlternative

Fusible defence

Five Elements can suppress Heimdall’s Almighty magic. Keep the chosen attack element available through transfers.

Earlier recommended alternatives

CybeleAlternative

Fusible damage

Build specifically for Fire damage and the challenge’s legal archetype. Check accuracy for physical attacks and preserve MP.

Kit-based options; tested clears remain in the guide’s team section.

Skills on multiple demons:

Hell Recovery

Used by: Mandrake, Heimdall, King Frost

Adds Null Bind/MortaI. +80% to hit rate. +300 to Phys ATK and Mag ATK. +300% to status ailment auto recovery rate.

Source

Hell Ultra Booster

Used by: Mandrake, King Frost

+20% to Max HP. +100 to Phys ATK and Mag ATK. +25% to damage dealt. +100% to Healing skill effectiveness.

Source

Skills on Mandrakes only:

Dark Pierce [weak] Underside

Used by: Mandrake

Gains Dark Pierce. Damage received by enemy through this skill is reduced by 70% if the enemy has Null, Repel or Drain Dark attribute.

Source

Hellsent: Dark

Used by: Mandrake

+40% to Max HP.. +100 to Phys ATK and Mag ATK.

Activates the following Chain Effect at the start of every second turn of the skill holder: Inflicts high-accuracy Dark damage (Physical, Power: 200) with a Bulwark-piercing effect and a 100% critical hit rate on all enemies.

Source

Skills on Heimdall only:

Stout Horn [Underside]6 MP

Used by: Heimdall

Inflicts Almighty damage (Magic, Power: 200) to a single enemy, and activates the following Chain Effect if the attack is successful: Increases the ATK, DEF, and EV/AC of all party members by 20%. (1 turn) This skill becomes Heroic Horn: Underside when the skill holder's HP becomes 50% or less. Heroic Horn: Underside Inflicts Almighty damage (Magic, Power: 200) to a single enemy, and activates the following Chain Effect if the attack is successful: Inflicts 25% Fractional damage (Max: 1000) based on Max HP on all enemies, and then reduces their MP by 2.

Source

Hell Eater

Used by: Heimdall

Activates the following Chain Effect at the start of enemy turn: Inflicts Almighty damage (Magic, Power: 20) on all enemies and drains 4MP.

Source

Hell Mega Booster

Used by: Heimdall

+30% to Max HP. +200 to Phys ATK and Mag ATK. +50% to damage dealt. +200% to Healing skill effectiveness.

Source

Hellbound: Phys

Used by: Heimdall

+50% to Max HP. +200 to Phys ATK and Mag ATK.

Activates the following Chain Effect at the start of enemy turn: Place 5 counts of Spirit Chains of Suppression on all enemies. (Once per battle)

Activates the following Chain Effect at the start of every third turn of the skill holder: Inflicts high-accuracy Phys damage (Physical, Power: 300) with a Bulwark-piercing effect and a 100% Critical hit rate on all enemies.

Source

Skills on King Frost only:

Ice Pierce [weak] Underside

Used by: King Frost

Gains Ice Pierce. Damage received by enemy through this skill is reduced by 70% if the enemy has Null, Repel or Drain Ice attribute.

Source

Cold World [Underside]7 MP

Used by: King Frost

Inflicts Ice damage (Magic, Power: 130) with a Bulwark-piercing effect on all enemies, then reduces their DEF by 20% (3 turns)and reduces their MP by 2.

Source

Hellsent: Ice

Used by: King Frost

+40% to Max HP.. +100 to Phys ATK and Mag ATK.

Activates the following Chain Effect at the start of every second turn of the skill holder: Inflicts high-accuracy Ice damage (Physical, Power: 200) with a Bulwark-piercing effect and a 100% critical hit rate on all enemies.

Source

Explanation

• Hellbound: Phys will apply 5 stacks of Spirit Chains of Suppression to you.
• Hell Eater drains your MP whenever your turn starts, and King Frost will drain your MP with Cold World Underside when he attacks (as well as applying ). When Heimdall falls below 50% HP, his Stout Horn Underside will also start draining your MP.
• If you fail to kill the adds by the start of their second turn, they will hit you with a bulwark-piercing, 100%-crit enrage AoE. Heimdall will do one too, if he isn't dead by his third turn - however his lacks phys pierce, so it can be reflected back at him with Repel Physical.

Baphomet (Underside) effect overview

• Self gets 50% HP, 180% Fire damage, 20% accuracy, 3 MP discount for Fire skills, and immunity to Spirit Chains of Suppression.
• The team gets 20% Fire damage and 20% accuracy.
• If any team member hits a weak point, Baphomet restores 2 MP to the whole team (up to 3 times per turn).

Colors

• Clear for the fusibles ruleset. The other colors don't offer anything useful for a Fire build.

Skill Transfer

• Trisagion (Underside) is ideal, otherwise use the highest-damage single-target attack skill you have. For example: Trisagion.
• Agidyne works as a cheap alternative.
• His innate Maragi can be leveled cheaply by transferring it from 2★.

Brands

• MATK% Spell.
• Due to his MP discount and MP restores (counteracting the enemy's MP drains), Divine's MP regen is probably not necessary.

Jack Frost (Underside) effect overview

• Self gets Concentrate (2.25x damage) on his first action - this is about 63% damage on average across his 2 actions on the first turn. Also gets 50% HP and immunity to Spirit Chains of Suppression.

Colors

• (Any)

Skill Transfer

• Use Agidyne.
• Jack Frost does not have any MP discounts, so 7 MP skills such as Trisagion may be too expensive to cast repeatedly.
  • Trisagion (Underside) starts at 7 MP, then becomes 6 MP at max level. This is the best skill he can use, but the cost of maxing it is very high.

Brands

• MATK% Spell or Divine.

Misc notes

• If using Trisagion (Underside), then Concentrate only affects the initial hit, not the AoE chain.
• Consider transcending him for skill switches, as that lets him easily swap builds between multiple areas.

Team restrictions:

Difficulty	Restriction
Lv 3-5	3 or more demons must be fusible*.
Lv 6-8	4 or more demons must be fusible.
Lv 9+	All 5 demons must be fusible.
Lv 6+	1 or more demons must be grade 79 (4★ base) or lower.
Lv 9+	1 or more demons must be Clear .

Notes regarding fusibles:

• Multi-fusions count.
  • Beelzebub☆ counts, despite needing a gacha-exclusive material to make him.
  • For limited-time multi-fusions, only the ones that are currently-available will count.
• Pixie and Slime count, even though you cannot fuse them.

Sample party

Huang Long Skills Speedster Tetrakarn Brands Divine Requirements Panel 4

Cybele Skills Fire Boost Back Attack Brands MATK% Divine Requirements Panel 3

Metatron Skills Butcher Maragidyne Brands MATK% Divine Requirements Panel 3

Surt Skills Fire Boost Fire Amp Brands MATK% Divine Requirements Panel 3

Baphomet Skills Baphomet (Underside) Trisagion Brands MATK% Divine Requirements -

Team notes:

• Everyone should have Divine brands, due to the tightness of MP in this fight.
• Huang Long for Repel Almighty Magic and his panel 4 magic damage aura. Yellow can also buff with Luster Candy to push more damage. He should go first in the party, so he can activate his magic damage aura ASAP.
• Cybele satisfies the Clear requirement, offers a team Fire damage aura (10% at base, 20% at p3), and has good innate Fire skills.
• Metatron for his panel 3's 20% magic damage aura. He also has Maragidyne so he can contribute his own damage.
• Surt pushes damage against King Frost.
• Remember to use Tetrakarn or use a Phys Reflector just before Heimdall does his Phys enrage!

Other options worth considering:

• Cerberus: 170 str and 150 mag, P3 gives a 20% phys/fire damage aura, 20% all-damage to Beast race, and 50% crit to self. Agidyne. War Cry for ATK and DEF Debuffs, and Yellow has War Dance for ATK and DEF Buffs. Hell Claw also applies Spirit Chains of Intimidation to help survival.
• Prometheus: 226 magic, has Fire Boost, p3 has 10% fire damage. Agidyne and discounted Maragidyne. Purple is also an option, swapping out the Maragidyne for Infinite Chakra.
• Anubis: 217 magic, Purple has Merciless Blow. Transfer Agidyne + Fire Boost.
• Titania: 235 magic, Purple has Back Attack. Transfer Agidyne + Fire Boost.
• Efreet: 208 magic, has Fire Boost, Purple has Back Attack. Maragi and Agilao. Alternatively, can use Clear for discounted Agidyne.

Team restrictions:

Sample party

Lost Name Skills Fire Boost Assassin Brands HP% Life or Divine Requirements -

Moloch Skills Fire Survivor Fire Boost Brands HP% Life or Divine Requirements -

Belial Skills Serial Killer Fire Boost Brands PATK% Divine Requirements -

Surt A Skills Butcher Fire Boost Brands MATK% Divine Requirements -

Baphomet Skills Baphomet (Underside) Trisagion Brands MATK% Divine Requirements -

Team notes:

• Lost Name is easily accessible, does good damage based on HP, and applies Spirit Chains of Intimidation to help the team survive. His panel 1 helps significantly, dropping the cost of Fatal Burn to just 4 MP at max skill level.
• Moloch: Does decent damage based on HP, and provides a 40% Fire damage aura.
• Surt A: 201 magic, has Fire Amp and 20% damage, P3 gives 25% damage. Eruption (120 power AoE + ramping 100-175 power random). Applies DEF Debuff when Eruption is used. Panel 2 can also change his Standard Attack into magic, allowing him to attack without needing MP.
• The remaining members are just whatever Fire users are available.
• Remember to use Tetrakarn or use a Phys Reflector just before Heimdall does his Phys enrage!

Other options worth considering:

• Moloch A: Applies Spirit Chains of Corrosion, and offers a 40% damage aura against foes affected by Spirit Chains.
• Cerberus: 170 str and 150 mag, P3 gives a 20% phys/fire damage aura, 20% all-damage to Beast race, and 50% crit to self. Agidyne. War Cry for ATK and DEF Debuffs, and Yellow has War Dance for ATK and DEF Buffs. Hell Claw also applies Spirit Chains of Intimidation to help survival.
• Mada:
• Cerberus A:
• Amon:
• Azazel:
• Mithras:
• Surt:
• Loki: 198 magic, p3 has 5% damage. Agidyne (160 power single-target).

Team restrictions:

Sample party

Baphomet Skills Baphomet (Underside) Trisagion Brands MATK% Spell Requirements -

Prometheus Skills Merciless Blow Serial Killer Brands MATK% Spell Requirements Panel 3

Queen Mab Skills Fire Enhancement Elec Enhancement Brands MATK% Spell Requirements -

Moloch Skills Fire Survivor Fire Boost Brands HP% Life Requirements -

Quetzalcoatl A Skills Serial Killer Fire Boost Brands MATK% Spell Requirements -

Team notes:

• Prometheus: 226 magic, has Fire Boost, p3 has 10% fire damage. Agidyne and discounted Maragidyne. Satisfies the 4★ requirement. Purple is also an option, swapping out the Maragidyne for Infinite Chakra.
• Queen Mab: 223 magic, has Merciless Blow and 15% damage, P1 gives 20% damage, P3 gives 30% damage. Also has 25% Fire damage aura for the team. Cuailnge (180 power AoE w/ Concentrate). Sets up a 1-turn ATK Buff at start of combat.
• Moloch: Does decent damage based on HP, and provides a 40% Fire damage aura.
• Quetzalcoatl A: 190 magic, has Fire Amp, P3 gives 25% damage. Aztec Pulse (ramping 120-160 power AoE). Applies ATK and DEF debuffs after every cast of his unique. Also, if he dies, then he will revive himself on your turn, cleansing off his own Spirit Chains of Suppression (since that disappears upon death), and casts a 1-turn Luster Candy. If he dies a second time, he will repeat this, on top of granting bulwarks and healing to the team.

Other options worth considering:

• Cerberus: 170 str and 150 mag, P3 gives a 20% phys/fire damage aura, 20% all-damage to Beast race, and 50% crit to self. Agidyne. War Cry for ATK and DEF Debuffs, and Yellow has War Dance for ATK and DEF Buffs. Hell Claw also applies Spirit Chains of Intimidation to help survival.
• Surt A: 201 magic, has Fire Amp and 20% damage, P3 gives 25% damage. Eruption (120 power AoE + ramping 100-175 power random). Applies DEF Debuff when Eruption is used. Panel 2 can also change his Standard Attack into magic, allowing him to attack without needing MP.
• Agni: 207 magic, has Fire Boost, P1 has 5% damage. Maragion. Purple applies DEF Debuff at start of combat.
• Anubis: 217 magic, Purple has Merciless Blow. Transfer Agidyne + Fire Boost.
• Titania: 235 magic, Purple has Back Attack. Transfer Agidyne + Fire Boost.
• Efreet: 208 magic, has Fire Boost and Purple has Back Attack. Maragi and Agilao. Alternatively, can use Clear for discounted Agidyne.