Trait
Dissolution Spread
For each Poison-type skill brought into battle, Water-type skills inflict 1 stack of Poison on enemies.
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NO.077
Spikecarap Bug(刺盔虫)
WaterPoisonPhase IIOriginal Form
Shells, wood chips, and seaweed often get stuck on its spines. The long spines contain numerous photoreceptor cells, making them extremely sensitive to light with negative phototaxis. To escape light, it grabs various objects during the day to shield itself. When food is abundant, its movement range also slightly increases.
Dex Number
077
Category
Spiky Creature
Height
0.83~1.19 M
Weight
22.5~29.8 KG
Updated
2026-06-07
Distribution
Unknown
Recommended Skill Sets
Poison Stack Burst Build
Playstyle
Speed Attack Suppression: Quickly stacks Poison layers, uses energy cost reduction mechanics for high-frequency high-damage output, while Corruption weakens enemies. Suitable for mid-speed matchups.
Why this set works
Rapid poison stacking startup with "Corrosive Acid," "Water Splash" for sustain and trait triggering, "Corruption" to weaken enemy output, and finally "Venom Infiltration" for low-cost high-damage burst after poison stacks accumulate, forming a complete poison-type fast attack cycle.
Venom Infiltration
Why pick this skill
Core damage skill with energy cost decreasing with more enemy Poison stacks (minimum 0 Energy), and applies 1 additional Poison stack per use. Combined with Trait "Dissolution Spread" for double Poison stacking—Thornhelm's main skill for late-game burst and sustained pressure.
Corrosive Acid
Why pick this skill
Efficient poison stacking method. Directly grants enemy 2 Poison layers, creating cost reduction condition for 'Venom Infiltration'. Also enables subsequent Water-type skills to apply Poison via trait. Core opener.
Corruption
Why pick this skill
0 Energy Cost support skill: More enemy Poison stacks = greater attack reduction (-30% dual ATK per stack). Effectively weakens enemy output and improves self-survival after poison stacking matures, perfectly synergizing with Poison system.
Water Splash
Why pick this skill
Low-cost (30) Water-type skill. Deals damage while recovering 1 energy, alleviating Spiny Helmet Bug's high-cost skill sustainability pressure. When carrying Poison-type skills, triggers trait to give enemy 1 additional Poison stack, combining output and poison stacking functions.
Energy Reduction Speed Attack Build
Playstyle
Energy Control: Use multiple cost reduction effects to release high-power skills early, quickly suppressing enemy HP, relying on Speed advantage to seize tempo
Why this set works
An extreme energy reduction build centered around "Salt Bath" and "Water Storage". "Spring" enjoys double cost reduction bonuses to deal high-power Water-type damage, while "Venom Infiltration" becomes a 0-energy cost finisher after poison stacking. Faster overall tempo, suitable for aggressive matchups.
Spring
Why pick this skill
0 Energy: Water-type skill, deals damage and gains +10 power per 1 Energy Cost reduced, combined with "Salt Bath"'s cost reduction can greatly boost output, while triggering Trait to apply Poison, ideal low-cost high-damage choice.
Saltwater Bath
Why pick this skill
0 Energy Cost support: Provides All Skills Energy Cost -2 (-3 when countering Defense), directly boosting [Spring Gush] Power and lowering [Venom Infiltration] threshold—the core engine of Energy Cost control system.
Venom Infiltration
Why pick this skill
Core Poison-type damage. Can achieve extremely low or even 0 energy cost release after Poison layer and cost reduction stacking. Combined with "Brine Bath" cost reduction, can enter burst phase earlier.
Water Storage
Why pick this skill
0 Energy startup technique, next skill energy cost -6, can let "Spring" or "Venom Infiltration" get significant cost reduction in first turn, quickly establishing advantage, also works with "Brine Bath" for extreme energy reduction
Defensive Counter Build
Playstyle
Sustained attrition: uses damage reduction and disengagement to buy turns, steadily stacks undispellable poison marks, late game suppresses enemy damage through Corruption, Venom Infiltration for cleanup. Suitable for unfavorable situations or against high-attack opponents
Why this set works
Using Bubble Illusion for survival, Plague Breath and Venom Infiltration for sustained Poison stacking, Corruption to weaken enemy damage, forming a defense-counter prolonged battle system, suited for dragging high-burst enemies into late-game for victory.
Bubble Phantom
Why pick this skill
0-cost counter-skill granting 80% damage reduction and automatic disengagement when responding to an attack—critical survival tool for Spikeshell, compensating for its four-type weakness and enabling Poison stacking or Charge buildup.
Plague Breath
Why pick this skill
0 Energy Poison Stacking method, grants 1 stack of Poison Mark (undispellable), serves as a supplementary poison stacking method for "Corrosive Acid", ensuring stable growth of poison stacks.
Venom Infiltration
Why pick this skill
Core damage. Higher returns with more Poison stacks. Steadily stack Poison in the safe environment created by "Bubble Illusion", achieve low-cost finishing in late game.
Corruption
Why pick this skill
The more poison layers on the enemy, the higher the attack reduction. Combined with [Plague Breath]'s mark poison stacking, has extremely strong suppression in prolonged battles while improving self-survival.
Notes
- Thorn Helmet Bug is a Water-type/Poison-type special attack creature. Trait [Dissolution Diffusion] causes Water-type skills to apply Poison layers when carrying Poison-type skills, with core mechanics revolving around [Poison] stacking and energy cost control.
- Base stats: Magic Attack 79, Magic Defense 88, and Speed 80 are relatively prominent. Physical Attack 33 is extremely low—completely specialized for special attack route.
- The skill pool has abundant Poison-type skills, but lacks stable recovery methods, relying on 「Water Splash」 for Energy recovery or 「Water Storage」 for cost reduction to maintain cycles
- Weak to four types: Electric, Earth, Fantasy, and Dark; watch your timing when entering.
Gallery
True Body
Shiny Form
Pet Egg
Pet Egg Alternate Color
Fruit
Evolution Chain
Skills
Lv. Lv.1
Defense
Energy: 1Defense
Reduces damage taken by 70%. Counters attacks.
Lv. Lv.1
Water Splash
Power: 30Magic Attack
Deals Magic damage. Self recovers 1 Energy.
Lv. Lv.8
Water Storage
Energy: 1Status
Energy cost of next Skill used -6.
Lv. Lv.9
Corrosive Acid
Energy: 2Power: 35Magic Attack
Deals Magic damage. Enemy gains 2 Poison stacks.
Lv. Lv.16
Corruption
Energy: 1Status
For each Poison stack the enemy has, enemy gains -30% ATK and MATK.
Lv. Lv.28
Wishing Star
Energy: 3Power: 110Magic Attack
Deals magic damage to the enemy creature.
Lv. Lv.35
Plague Breath
Energy: 3Status
Enemy gains 1 stack of Poison Mark.
Lv. Lv.36
Bubble Phantom
Energy: 2Defense
80% damage reduction, when responding to an attack: retreat.
Lv. Lv.37
Venom Infiltration
Energy: 5Power: 120Magic Attack
Deals Magic damage. For each Poison stack on enemy, this skill's Energy Cost -1, and enemy gains 1 Poison stack.
Lv. Lv.40
Poison Mist
Energy: 7Status
Converts all enemy buffs into Poison.
Lv. Lv.41
Spring
Energy: 6Power: 90Magic Attack
Deals Magic damage. For every -1 Energy Cost of this skill, Power +10.
Lv. Lv.49
Saltwater Bath
Energy: 2Status
Self gains -2 All Skill Energy Cost, Against Defense: changed to -3 Skill Energy Cost.
Lv. Lv.50
Infection
Energy: 4Power: 110Magic Attack
Deals Magic damage. If it defeats the target, converts Poison into Poison Mark.
Lv. Normal Lineage
Star Crash
Energy: 2Power: 90Magic Attack
Deals magic damage to the enemy creature.
Lv. Grass Lineage
Etiolation
Energy: 2Status
Restore 10 energy to self.
Lv. Fire Bloodline
Ignite
Energy: 2Status
Enemy gains 10 stacks of Burn.
Lv. Water Bloodline
Water Blaster
Energy: 2Power: 80Magic Attack
Deals magic damage to the enemy creature.
Lv. Light Lineage
Rainbow Impact
Energy: 3Power: 100Magic Attack
Deals magic damage to the enemy creature.
Lv. Earth Lineage
Mud Armor
Energy: 2Status
Self gains +60% Physical Attack and Physical Defense, Against Defense: additionally doubles own buffs.
Lv. Ice Lineage
Frost Descent
Energy: 1Status
Enemy gains 4 stacks of Freeze.
Lv. Dragon Bloodline
Rising Dragon Roar
Energy: 3Power: 200Magic Attack
Charge up to deal magic damage to the enemy.
Lv. Electric Lineage
Paralysis
Energy: 2Status
Enemy priority -1. When responding to Defense: Additionally, enemy gains -70% ATK and MATK.
Lv. Poison Bloodline
Poison Swamp
Energy: 2Power: 80Physical Attack
Deals physical damage to the enemy creature.
Lv. Bug Lineage
Feigned Sleep
Energy: 2Status
Restore 2 energy to self; your team gains 1 Devotion: energy cost -2.
Lv. Martial Bloodline
Neutralize
Energy: 2Status
Self gains +40 All Skill Power.
Lv. Wing Lineage
Eclosion Acceleration
Energy: 2Status
Self gains +20 All Skill Power, Swiftness.
Lv. Cute Lineage
Sweetheart Endurance
Energy: 3Status
Self and the enemy gain Adorify: Restores 40% HP.
Lv. Nether Bloodline
Soul Snare
Energy: 1Status
Steal 3 Energy from the enemy.
Lv. Dark Lineage
Greed
Energy: 2Status
Self gains 100% lifesteal.
Lv. Mechanical Lineage
Mesh Transmission
Energy: 1Status
The user gains +30 Speed. If this skill is in slot 1 or 3, additionally gains +80% Physical Attack and Transmission 1.
Lv. Phantom Lineage
Hyperdimensional Projection
Energy: 4Status
Enemy gains 4 stacks of Starfall Mark.
Lv.
Soak
Energy: 4Status
Self gains 1 stack of Wet Mark.
Lv.
Plunder
Energy: 1Power: 60Magic Attack
Deals magic damage to the enemy creature.
Lv.
Power Devour
Energy: 4Status
Enemy gains All Skill Power -20; self gains All Skill Power +20.
Lv.
Backroom Deal
Energy: 1Status
Self gains -100% Dual Attack and Dual Defense, Against Defense: changed to enemy gains -100% Dual Attack and Dual Defense.
Lv.
Annihilation
Energy: 5Power: 155Magic Attack
Deals magic damage to the enemy creature.
Lv.
Reinforce
Energy: 2Status
Self gains +140% Physical Defense.
Lv.
Cheer On
Energy: 3Status
Self gains +170% Magic Defense.
Lv.
Sunbathing
Energy: 1Status
Dispels all buffs from the enemy.
Lv.
Stress Response
Energy: 2Status
Restore 25% HP to self, Counter Defense: instead restore 50% HP.
Lv.
Mental Disruption
Status
Enemy gains All Skill Energy Cost +1. When countering Defense: Instead becomes Energy Cost +3.
Lv.
Severe Poison
Energy: 2Status
Enemy gains 3 stacks of Poison. When countering Defense: Instead gains 8 stacks.
Lv.
Moisture
Energy: 7Status
Self gains +190% Magic Attack.
Lv.
Duplication
Status
Each turn, randomly transforms into a skill it doesn't have equipped, and that skill's energy cost -2.
Lv.
Zhen Poison
Energy: 3Power: 75Magic Attack
Deals magic damage. This skill's Power +10 for each stack of poison the opponent has. Counter state: Changed to this skill's Power +40.
Lv.
Cleanse
Status
Dispels its own debuffs. For each stack of debuffs it has, this skill's energy cost is reduced by 1. Adaptive Change: Water-type attack skill.
Matchups
受击伤害增加
Earth, Electric, Dark, Phantom
受击伤害降低
Fire, Poison, Bug, Martial, Cute, Mech
Stats
HP94
Physical Attack33
Magic Attack79
Physical Defense61
Magic Defense88
Speed80
Total435
Handbook Tasks
Codex Project
Progress: 4 items
Catch 1 Pokémon
Target: 1
Catch 1 Pokémon with Amazing Talent
Target: 1
Successfully evolve a creature 1 time
Target: 1
Confirm 2 different forms of Thorn Helmet Bug
Magic Experience x150
Research Points x5
Magic Experience x150
Research Points x10
Light-Splitting Crystal x50
Research Points x10
Wishing Star x1
Research Points x20