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Image
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Details
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| 1
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Octopus Cave
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- Read the Octopus Cave book at (87,32) in the Dimensional Library.
- Requires level 220+. The party leader also needs an
 Octopus Hunting Stick rented from the Instance Shop, otherwise the book refuses to create the instance.
- First time, the Starfish explains the story and gives you the First time in Octopus Cave quest. Every member enters through the party.
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| 2
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Slimy Octopus Leg
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- You arrive at the central hub, (199,99). The Giant Octopus announces that it sealed the main gate and sends its offspring out.
- Four side doors open at (193,82), (187,99), (209,100) and (209,83). Each one drops you beside a different leg chamber, and four return doors bring you back.
- The four Giant Octopus Legs sit at (20,114), (88,190), (307,215) and (372,131). Loose legs and Slimy Octopus are spread over the whole cave.
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| 3
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Slimy Octopus Leg
Slimy Octopus
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- West chamber, leg at (20,114). The north-west door lands you at (151,48).
- Stepping into the chamber calls six Slimy Octopus and the exit warp at (16,117) opens after 30 seconds, or right away once the chamber is empty.
- The leg has 30 HP, is immune to every damage type and loses exactly 1 HP per hit, so it takes 30 hits. It casts Wide Freeze, Wide Soul Drain, Quagmire, Decrease Agi, All Stat Down and Strip Shadow.
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| 4
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Slimy Octopus Leg
Slimy Octopus
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- South-west chamber, leg at (88,190). The south-west door lands you at (148,128).
- Six Slimy Octopus spawn on entry. The exit warp at (77,193) returns you to the hub.
- Slimy Octopus only takes 10% of the damage you deal, so use your strongest single hits rather than many weak ones. It casts Ignition Break and Critical Wound.
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| 5
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Slimy Octopus Leg
Slimy Octopus
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- East chamber, leg at (307,215). The south-east door lands you at (250,111).
- Six Slimy Octopus spawn on entry. The exit warp at (312,214) returns you to the hub.
- Killing the leg only announces that it hurts. The progression check happens when all four legs are dead.
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| 6
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Slimy Octopus Leg
Slimy Octopus
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- North-east chamber, leg at (372,131). The north-east door lands you at (252,46).
- Six Slimy Octopus spawn on entry. The exit warp at (370,139) returns you to the hub.
- Watch for the four ambush tiles at (45,53), (78,99), (299,144) and (336,36). Each one spawns extra legs and octopus the first time it is stepped on.
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| 7
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Giant Octopus
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- When the fourth leg dies, the Giant Octopus takes over and the whole party is pulled back to the hub.
- The boss warp opens at (198,116) and drops you at (210,172), in front of the Giant Octopus at (199,188).
- It has 100,000,000 HP. Every 60 seconds it summons two more minions, up to 100 at a time, and it casts Power Swing, Water Ball, Pulse Strike, Wide Leash and Shield Break.
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| 8
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Giant Octopus
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- Below 50% HP it casts Immune Property, and below 20% HP it starts using Earthquake. Save your burst for the last phase.
- On death, twelve treasure chests appear at (190,187) to (210,192). Every party member can claim one, and each chest pays 300
 Galaxy String plus 40% for every extra member.
- The MvP also has a chance to drop Rift Engine S, Voidbreaker Key, Old Card Album and the (MvP) Giant Octopus Card.
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| 9
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Aster
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- Talk to Aster at (190,208). First clear pays 15
 Echo Scripture S and the Octopus Cave achievement.
- The party leader can also take 29 to 39
 Chrono Coin S from Aster once per run.
- Choose to leave and he warps you to the Dimensional Library at (86,40). Party members who are not the leader get 19 to 29 Chrono Coin S on the way out. The warp at (198,82) also exits the cave.
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Infinity Core Piece
Rift Engine S 
Voidbreaker Key 
Old Card Album 
Outer Galaxy Crystal 
MvP Footprint A 
(MvP) Giant Octopus Card