To beat the buffed Arcapex in the new Evomon update, open with Lava Rock to set Sandstorm, switch into a Grass carry like Thord Lord or Teragon, stack Seed Bomb and Rally, then finish with Quicksand and ultimates.
Arcapex, the King of Thunder and the final Lightning boss on Thunder Cliffs, hits a lot harder since the developers buffed him in the latest patch. The old habit of stalling him out with status damage is dead — he is now immune to Burn, Poison, and Frostbite, so chipping him with debuffs simply does nothing. What actually works is direct weather setup plus a Grass carry that can heal through his Lightning burst while it scales its own damage.
Beating the buffed Arcapex fast
The buff means you can no longer coast on abnormal effects or a glass-cannon that dies before it stabilizes. Arcapex is a mono-Lightning boss, which leaves him weak to Grass, Ground, Dark, and Light, and the reliable post-update plan leans on that Grass weakness. You open with Lava Rock to lock in Sandstorm for constant chip, then bring in a Grass carry to sustain and build up before you ever commit real damage.
Team and moves to bring in
| Slot | Use |
|---|---|
| Lava Rock (lead) | Open the fight and set Sandstorm with its ultimate for battle-long chip. |
| Second Lava Rock / backup | Safety net to re-open or absorb a hit so the Grass carry switches in clean. |
| Grass carry — Thord Lord or Teragon | Main killer; stacks Seed Bomb to sustain, Rally to scale, then finishes. |
The setup is small: two Lava Rocks and one Grass-type Evomon. The Grass slot is your actual Arcapex killer — Thord Lord and Teragon are both solid picks here, so bring whichever you have leveled. Grass/Dragon-style carries in this family (also spelled Tarragon or Terragon in-game) are the preferred counter because Seed Bomb lets them heal every turn while still attacking.
Level matters, but treat the popular 90+, 100+, or 120 figures as recommendations rather than hard gates — a well-built carry with defensive traits like Stoneheart or Prime Form and a Guardian Suit survives far better than a raw high-level with no defense. Lava Rock evolves from Levite on Lava Crag Island, and the Grass carries are found in Merkwood.
How to defeat Arcapex in Evomon
This is the exact post-update rotation — open with Lava Rock for Sandstorm, then let your Grass carry stack up and finish him off.
STEP 1/9
Send out Lava Rock first
Lead the battle with Lava Rock before anything else.
STEP 2/9
Use Fatal Rebound
Fire Fatal Rebound to set up Lava Rock’s turn.
STEP 3/9
Cast Lava Rock’s ultimate
The ultimate shifts the weather over to Sandstorm for the rest of the fight.
STEP 4/9
Switch to your Grass carry
Once Sandstorm is up, swap into Thord Lord (or Teragon).
STEP 5/9
Stack Seed Bomb six times
Use Seed Bomb six times to stack its healing effect before you attack.
STEP 6/9
Stack Rally six times
Cast Rally six times to reach a 300% attack boost.
STEP 7/9
Drop Quicksand to lower defense
Use Quicksand to cut Arcapex’s defense open.
STEP 8/9
Cast your ultimate
Follow the defense drop with your ultimate for heavy damage.
STEP 9/9
Repeat Quicksand and ultimates
Keep looping Quicksand and your ultimate whenever they’re available until Arcapex goes down.
Video help
What the Lava Rock and Grass rotation does
Every piece of this rotation has a job. Sandstorm from Lava Rock’s ultimate ticks passive chip damage on non-Ground units for the whole fight, so Arcapex is losing HP even on turns you spend setting up. That free damage is why the open matters more than it looks.
Mistakes that fail runs after the update
| Mistake | Fix |
|---|---|
| Trying to win with Burn, Poison, or Frostbite | He’s immune to status; kill him with Grass burst and Sandstorm instead. |
| Entering underleveled or trait-light | Bring a leveled carry with defensive traits and a Guardian Suit before the run. |
| Ignoring Thor Power and his Lightning burst | Stay healed through Seed Bomb stacks so a doubled Lightning hit can’t finish you. |
| Attacking before Seed Bomb and Rally are stacked | Finish all six of each; only commit damage once you’re set up. |
| Bringing a fragile, non-resistant team | Avoid Water/Flying/Steel carries that fold to Lightning; lead into the Grass counter. |
Finish all six Seed Bomb and six Rally stacks before you land a single attack — the healing keeps you alive through Thor Power and the boost is what makes your ultimate actually kill.
If you don’t have Thord Lord built, Teragon slots straight into the same rotation — the two are the video-backed Grass options, and you’ll also see the name written as Tarragon, Terragon, or Terrigon in-game, so don’t get thrown by the spelling. Datunymph gets named as another possible Arcapex counter, but there isn’t enough moveset detail on it to trust as a main plan, so treat it as an experiment rather than the route.
Whatever you pick, the recommended path stays the same: Lava Rock for the Sandstorm open, then a Grass setup carry that stacks Seed Bomb and Rally before committing.
Where to go after the Arcapex kill
Once Arcapex is down, the natural next step is capturing Arcub and evolving it toward your own Arcapex using Evolution Stones and Electric Element Stones. From there it becomes a project for later content — building Arcapex with the right moves, traits, and suit for raids and PvP. None of that is needed to clear the boss, but it’s where most players head next.
Frequently Asked Questions
Can I use Teragon instead of Thord Lord?
Yes. Thord Lord and Teragon are both valid Grass carries for this fight and run the exact same rotation, so bring whichever one you have leveled and built.
Do I really need two Lava Rocks?
The setup calls for two Lava Rocks plus one Grass carry. The second Lava Rock is a safety net — it lets you re-open or absorb a hit so your Grass carry switches in cleanly with Sandstorm already running.
Why is Seed Bomb used six times before attacking?
Seed Bomb stacks per-turn healing, and six stacks give your carry enough sustain to survive Arcapex’s Lightning burst while you finish setting up. Attack before it’s stacked and you’ll likely get knocked out before your damage comes online.
Can Burn, Poison, or Frostbite beat Arcapex after the update?
No. Since the buff, Arcapex is immune to abnormal status effects, so Burn, Poison, and Frostbite do nothing. You have to beat him with direct damage through his Grass weakness plus Sandstorm chip.
What should I do after Arcapex uses Thor Power?
Thor Power doubles his next Lightning attack, so make sure you’re topped up on Seed Bomb healing before it lands. Keep your carry healthy through that hit, then continue looping Quicksand and your ultimate.
