Collect four Echobones
Marine, Silent, Seafoam, and Tidewind Echobones all come from the glowing whale skeletons near the towers.
Glowing whale skeletons, all near towers
Boss guide
How to Beat and Catch Panthalus Like a Pro
LV 70WaterLegendaryGuaranteed catch
The Ocean King guards the World Tree, and it is the one boss the game will not let you kill by accident. Summon it, fly it down with a full-Electric party, and take it home at one HP.
Catch rate100%at one HP, with any sphereJump through the guide
The short version
The whole Panthalus run in five moves
Panthalus is a level 70 Water Legendary and the only boss in the game with a guaranteed catch. That single rule changes how you fight it: you are not racing a health bar down to zero, you are steering it to one HP and then throwing.
The whole runSummon it, sink it, keep it
Summon at the Deserted Islet
Four Echobones become the Echoing Flute, and the flute calls the fight at the shrine.
Bring the full-Electric crew
Electric damage melts a Water king, so every party slot feeds the same element.
Stay airborne
You live on a mount for the whole fight, which is what beats the island-wide attacks.
Aim center mass
Body shots crit hard and the crown crystal takes bonus damage on top.
Catch at one HP
Panthalus locks at critical health, so any sphere finishes the run.
The run on video
Watch the full Ocean King fight
The written guide below carries every step. The Short is the same run in motion, from the flute at the shrine to the sphere landing on a boss that cannot die.
Before the fight
Summon the Ocean King at the Deserted Islet
Panthalus does not roam. You call it up with an item you build yourself, which means the first half of this fight is a short collection route rather than combat.
Craft the Echoing Flute
The four bones combine into one flute. Any workbench back at your base can build it.
Any workbench at your basePlay it at the shrine
The shrine sits on the Deserted Islet beside the researcher. Playing the flute there starts the fight.
Deserted Islet, next to the researcherBuild the team that wins it
Run the full-Electric crew, top to bottom
Electric damage melts a Water king, so the party is not a mix of answers. Every slot either converts your damage to Electric, multiplies it, keeps your gear alive, or keeps you in the air.
Prixter Lux
Converts your damage to Electric, which is the whole reason this party works.
Gobfin
Stacks flat attack on top of the conversion for free.
Gobfin Ignis
A second copy of the same attack bonus from a different species.
Tetroise Primo
Keeps weapons and armor from breaking during a long fight.
Jetragon
The main mount. Bring a second flyer as a backup, because you never land.
No Prixter Lux? Helzephyr Lux slots straight in.
Why the party works
The damage engine behind the five slots
Prixter Lux is the engine and the Gobfins are the amplifiers. The percentages are partner-skill ceilings at max rank, so treat them as the top of the curve rather than what a freshly caught Pal gives you today.
Party mathEvery percentage below is a max-rank ceiling
| Source | What it does | Ceiling |
|---|---|---|
| Prixter Lux | Converts your damage to ElectricThe conversion is the engine. The attack bonus stacks on top of it. | Up to 50% attack |
| Gobfin | Flat attack bonus while in the partyDifferent species, so it combines with Gobfin Ignis instead of overwriting it. | Up to 20% attack |
| Gobfin Ignis | Flat attack bonus while in the partyThe second amp slot, and the reason the party runs both Gobfins. | Up to 20% attack |
| Tetroise Primo | Weapons and armor do not break mid fightNo damage of its own, but it keeps the rest of the kit online. | Durability |
| Two flying mounts | Jetragon main plus any flyer backupThe fight is a chase, so a downed mount cannot cost you the run. | Uptime |
Three things it does
Read the fight instead of trading hits
Panthalus has one attack that erases the arena, one habit that keeps it away from you, and two weak points that pay for every bullet. Handle those three and the fight is a long, safe grind.
Island wash
Half its attacks wash over the entire island at once.There is no safe corner of the arena for these. Watch for the big wind-up, then fly out over open water and hold there until the wave passes.
Big wind-up equals exit cueThe kite
It circles the arena and snipes from range.Panthalus never sits still, so the fight is a chase. Stay mounted, run it down, and keep your partner skill firing the whole way.
Stay mounted, keep chasingThe openings
Body shots crit big and the crown crystal takes bonus damage.Two weak points, one simple rule. When the arc of the fight makes the crown hard to hit, put everything into the body instead of waiting for a perfect angle.
Aim center massAim center mass
The part nobody believes
The guaranteed catch, and why you cannot fail it
This is the section that changes how the fight feels. Once the health bar bottoms out, the pressure is gone: there is no capture roll, no rarity check, and no way to accidentally kill the thing you came for.
1 HPand it stops there
It locks at critical health
Drop Panthalus to one HP and it stops there. It literally cannot die, so there is no overkill to fear.
Any sphere works
Throw whatever you are carrying, even the most basic sphere. The rarity of the sphere changes nothing here.
One hundred percent guaranteed
This is the only boss with a guaranteed catch. The throw is not a roll, it is a formality.
A ten minute window
The critical-health state holds for ten minutes. Heal up, reposition, line the throw up properly.
100% guaranteed
The payoff
After the catch, the World Tree opens
With Panthalus in your party the World Tree barrier parts, and the whole late game behind it becomes reachable. If you are still building toward the level 80 encounter, our Pal leveling route is the fastest way to close the gap.
The Sealed Calamity quest
The next story beat behind the barrier opens as soon as the tree lets you through.
Radiant Gems and Awakening
The World Tree region is where the Awakening material economy actually starts.
The level 80 final fight
The endgame encounter sits at the far end of the same unlock.
Fast answers
Panthalus questions
Is the Panthalus catch really guaranteed?
Yes. Panthalus is the only boss with a guaranteed catch. At one HP it locks at critical health and cannot die, and any sphere you throw captures it at one hundred percent.
What level should I be before summoning Panthalus?
Panthalus is a level 70 Water Legendary. A party in the high 50s and up can win the damage race with the full-Electric setup, but the mount uptime and the island-wide attacks punish an underleveled trainer more than raw stats do.
What if I do not have Prixter Lux?
Helzephyr Lux slots straight in. It gives you the same Electric conversion while mounted, so the rest of the party plan does not change.
Do I have to fight Panthalus again if the catch fails?
You cannot fail the catch. Once Panthalus is at critical health you get a ten minute window to throw, the throw always succeeds, and the fight ends with the Pal in your party.
What does catching Panthalus unlock?
With Panthalus in your party the World Tree barrier parts. That opens the Sealed Calamity quest, the Radiant Gems and Awakening material chain, and the route to the level 80 final fight. Keep it in your party, because it is the key.
Keep the momentum
Take the Ocean King through the tree
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